---
title: "TYPO3 Exception 1297759968"
manual: "TYPO3 Exceptions"
version: "main"
permalink: "https://docs.typo3.org/permalink/t3exceptions:typo3-exception-1297759968"
source: "Exceptions/1297759968.rst"
rendered: "2026-10-02T18:04:37+00:00"
---

# TYPO3 Exception 1297759968 {#typo3-exception-1297759968}

> [!NOTE]
> Below, the TYPO3 community may have provided additional information or
> solutions for this exception. However, these may or may not apply to your
> particular case. If you can provide more information, you should come back
> here and add your experience and solution steps to this issue once you have
> resolved it.
>
> General TYPO3 troubleshooting tips can be found in the *Troubleshooting*
> section in the menu. You can also ask questions and receive support in the
> [TYPO3 Questions category on talk.typo3.org](https://talk.typo3.org/c/typo3-questions/).
>
> To add your experience, click "Edit on GitHub" above and follow the
> ["Edit on GitHub" workflow](https://docs.typo3.org/m/typo3/docs-how-to-document/main/en-us/Howto/EditOnGithub.html#docs-contribute-github-method).
> Also check out
> [our tip on Coding Style and reST](https://docs.typo3.org/permalink/t3exceptions:tip-about-rest-coding-style).

-   [When using Extbase FileUpload, TYPO3 13.4.17](https://docs.typo3.org/permalink/t3exceptions:when-using-extbase-fileupload-typo3-13-4-17)
-   [Exception while property mapping at property path "":Object with identity "1" not found.](https://docs.typo3.org/permalink/t3exceptions:exception-while-property-mapping-at-property-path-object-with-identity-1-not-found)
-   [Exception while property mapping at property path "":Method::__construct() does not exist](https://docs.typo3.org/permalink/t3exceptions:exception-while-property-mapping-at-property-path-method-construct-does-not-exist)
-   [Exception while property mapping at property path "":Could not find a suitable type converter for "array|null" because no such class or interface exists](https://docs.typo3.org/permalink/t3exceptions:exception-while-property-mapping-at-property-path-could-not-find-a-suitable-type-converter-for-array-null-because-no-such-class-or-interface-exists)
-   [Exception while property mapping at property path "": Could not find a suitable type converter for "..." because no such class or interface exists.](https://docs.typo3.org/permalink/t3exceptions:exception-while-property-mapping-at-property-path-could-not-find-a-suitable-type-converter-for-because-no-such-class-or-interface-exists)
-   [Exception while property mapping at property path "...": Could not determine the child object type.](https://docs.typo3.org/permalink/t3exceptions:exception-while-property-mapping-at-property-path-could-not-determine-the-child-object-type)
-   [Exception while property mapping at property path "Property 0" was not found in target object of type "..."](https://docs.typo3.org/permalink/t3exceptions:exception-while-property-mapping-at-property-path-property-0-was-not-found-in-target-object-of-type)
-   [Exception while property mapping at property path "...":No converter found which can be used to convert from "array" to "string".](https://docs.typo3.org/permalink/t3exceptions:exception-while-property-mapping-at-property-path-no-converter-found-which-can-be-used-to-convert-from-array-to-string)
-   [Exception while property mapping at property path "It is not allowed to map property "badproperty". ..."](https://docs.typo3.org/permalink/t3exceptions:exception-while-property-mapping-at-property-path-it-is-not-allowed-to-map-property-badproperty)
-   [Exception while property mapping at property path "":The target type was no string, but of type "NULL"](https://docs.typo3.org/permalink/t3exceptions:exception-while-property-mapping-at-property-path-the-target-type-was-no-string-but-of-type-null)
-   [Exception while property mapping at property path "": Path does not exist in array](https://docs.typo3.org/permalink/t3exceptions:exception-while-property-mapping-at-property-path-path-does-not-exist-in-array)
-   [Exception while property mapping at property path "propertyname": The identity property "" is no UID.](https://docs.typo3.org/permalink/t3exceptions:exception-while-property-mapping-at-property-path-propertyname-the-identity-property-is-no-uid)
-   [Exception while property mapping at property path "filter": No delimiter configured for TYPO3CMSExtbasePropertyTypeConverterArrayConverter and non-empty value given.](https://docs.typo3.org/permalink/t3exceptions:exception-while-property-mapping-at-property-path-filter-no-delimiter-configured-for-typo3-cms-extbase-property-typeconverter-arrayconverter-and-non-empty-value-given)

## When using Extbase FileUpload, TYPO3 13.4.17 {#when-using-extbase-fileupload-typo3-13-4-17}

> [!WARNING]
> Exception while property mapping at property path "": Expected argument of type
> "TYPO3CMSExtbaseDomainModelFileReference", "TYPO3CMSCoreHttpUploadedFile"
> given at property path "documents".

The import for the PHP Attribute was missing

**packages/MyExtension/Classes/Domain/Model/MyModel.php**

```diff
+use TYPO3\CMS\Extbase\Annotation\FileUpload;

 #[FileUpload([
     'validation' => [
         'minFiles' => 0,
         'maxFiles' => 1,
         'mimeType' => ['allowedMimeTypes' => ['application/pdf']],
     ],
     'uploadFolder' => '2:/documents/',
 ])]
 protected ?FileReference $documents = null;
```

Adding the proper import to properly utilize the attribute will then also properly allow introspection of the PropertyMapper later on.

## Exception while property mapping at property path "":Object with identity "1" not found. {#exception-while-property-mapping-at-property-path-object-with-identity-1-not-found}

This error is thrown when a link to a hidden record is called.

## Exception while property mapping at property path "":Method::\_\_construct() does not exist {#exception-while-property-mapping-at-property-path-method-construct-does-not-exist}

The ReflectionService tries to get the constructor arguments of your
model class, which in this case seem not to exist.

As a work around you can put an empty `__construct` method in your model
class

```
/**
 *
 */
public function __construct() {
}

```

## Exception while property mapping at property path "":Could not find a suitable type converter for "array|null" because no such class or interface exists {#exception-while-property-mapping-at-property-path-could-not-find-a-suitable-type-converter-for-array-null-because-no-such-class-or-interface-exists}

See [https://forge.typo3.org/issues/48172](https://forge.typo3.org/issues/48172)

Try updating the relevant extensions and TYPO3. If everything is up-to-date and the
error still occurs setting the TypoScript option `plugin.tx_news.features.rewrittenPropertyMapper = 0` may help.

> [!TIP]
> **Hint**
>
> Enabling/disabling the `rewrittenPropertyMapper` has huge
> impacts on extbase behaviour. You are strongly advised to learn about
> the "new" propertyMapper and how to use/configure it rather then
> deactivating it.

## Exception while property mapping at property path "": Could not find a suitable type converter for "..." because no such class or interface exists. {#exception-while-property-mapping-at-property-path-could-not-find-a-suitable-type-converter-for-because-no-such-class-or-interface-exists}

After adding an new model and clearing the caches (BE -> **Flush system caches**, `rm -rf typo3temp/Cache/`), the new class still was not found.
Deactivating and reactivating the extension was solution.

Background: the autoload information (`typo3temp/autoload/`) wasn't
flushed/updated. Since TYPO3 v8 there's a option in the install-tool for
regenerating the autoconfiguration files.

## Exception while property mapping at property path "...": Could not determine the child object type. {#exception-while-property-mapping-at-property-path-could-not-determine-the-child-object-type}

Try clearing all caches.

Try to truncate the `cf_extbase_reflection` table after you modified the
model.

## Exception while property mapping at property path "Property 0" was not found in target object of type "..." {#exception-while-property-mapping-at-property-path-property-0-was-not-found-in-target-object-of-type}

When using extended models you need to set the base class variables to
protected instead of private.

Another solution could be to truncate the "cf_extbase_reflection" table

This error is also displayed if a property in a fluid-form is wrong. In
my case I had property="{object.propertyName}" instead of
property="propertyName"

## Exception while property mapping at property path "...":No converter found which can be used to convert from "array" to "string". {#exception-while-property-mapping-at-property-path-no-converter-found-which-can-be-used-to-convert-from-array-to-string}

The solution is there: [http://stackoverflow.com/questions/16405963/typo3-how-to-use-file-upload-with-extbase](http://stackoverflow.com/questions/16405963/typo3-how-to-use-file-upload-with-extbase)

## Exception while property mapping at property path "It is not allowed to map property "badproperty". ..." {#exception-while-property-mapping-at-property-path-it-is-not-allowed-to-map-property-badproperty}

-   Possible Cause: For me the reason was a \<form> inside a \<form>. Seems like the \_\_trustedProperies in the second form made my first form to fail.
-   See also: [http://stackoverflow.com/questions/18654920/extbase-exception-while-property-mapping-at-property-path](http://stackoverflow.com/questions/18654920/extbase-exception-while-property-mapping-at-property-path)

If `badProperty` is an ObjectStorage that holds references to other
models and you want to edit this relation in a Fluid form with a
multiselect or checkboxes, don't let Fluid convert your objects. So
instead of doing this:

```
<f:form.checkbox property="yourProperty" value="{someObject}" />

```

assign only the uid integers to the viewhelper, like this:

```
<f:form.checkbox property="yourProperty" value="{someObject.uid}" />

```

## Exception while property mapping at property path "":The target type was no string, but of type "NULL" {#exception-while-property-mapping-at-property-path-the-target-type-was-no-string-but-of-type-null}

See [https://forge.typo3.org/issues/66049](https://forge.typo3.org/issues/66049)

This issue concerning passing an array of objects to a controller action
should have been resolved in 7.x because the old property mapper has
been removed completely.

## Exception while property mapping at property path "": Path does not exist in array {#exception-while-property-mapping-at-property-path-path-does-not-exist-in-array}

When resetting options in YAML config files for EXT:form write

```
formEditor:
  editors:
    700: null

```

instead of

```
formEditor:
  editors:
    700:
      identifier: null
      templateName: null

```

## Exception while property mapping at property path "propertyname": The identity property "" is no UID. {#exception-while-property-mapping-at-property-path-propertyname-the-identity-property-is-no-uid}

TYPO3 expects a relation as a property and can't find it. Check if a related database record exists (here: at "propertyname") and make sure to catch the error if no relation is present.

This can also happen if an extbase form has an object with a file upload element (and involved TypeConverters): If a bot maliciously spams your form, it might submit a POST/GET request with that type=file upload element, but uses type=text instead. This will lead into a structure, where the property will not contain the expected array data (tmp_name, name, errors, size, ... from $\_FILES), and lead to this exception. In this case the error would say `The Identity property "a2vsd3fs" is no UID`, where `a2vsd3fs` is the actual random spam string submitted by the bot, even though it reads like a TYPO3 internal UID placeholder.

You can silence that error by using an initializeAction and checking if the mentioned properties actually are submitted as an array, or only as a string. But in fact, this exception would not be "wrong", because the actual bot request was faulty. But we wanted this recurring error not to flood our sys_log entries.

(TODO: This might also be fixable with better property mapping configuration and/or TypeConverter checks catching this error; the UploadedFileReferenceTypeConverter from Helmut Hummel was used in this case, which provoked the error above)

## Exception while property mapping at property path "filter": No delimiter configured for TYPO3CMSExtbasePropertyTypeConverterArrayConverter and non-empty value given. {#exception-while-property-mapping-at-property-path-filter-no-delimiter-configured-for-typo3-cms-extbase-property-typeconverter-arrayconverter-and-non-empty-value-given}

This could happen if your Fluid ViewHelper for a checkbox is like this and filter is an array:

```
<f:form action="myAction" objectName="MyDto" object="MyDto">
    <f:form.checkbox property="filter" value="TYPO3" />
</f:form>

```

You have to add multiple="1" in the Fluid ViewHelper:

```
<f:form action="myAction" objectName="MyDto" object="MyDto">
    <f:form.checkbox property="filter" value="TYPO3" multiple="1" />
</f:form>
```