An index must be available to generate image data or preview images.
If this is not available, an error message appears immediately after the command is called up.
Error when creating the index. Make sure that an index has been created for the base element. [Error on index creation. Make sure that an index was created for the baseitem.]
The easiest way to do this in PARTproject is via the Update index button.

![Export image data [Export images]" dialog box](https://webapi.partcommunity.com/service/help/latest/pages/jp/partsolutions_user/doc/resources/img/img_a82fa2fcf5474c4d878da175ef53bbc1.png)

![Error when creating the index. Make sure that an index has been created for the base element. [Error on index creation. Make sure that an index was created for the baseitem.]](https://webapi.partcommunity.com/service/help/latest/pages/jp/partsolutions_user/doc/resources/img/img_0201635cd72d45d1bab2de6c31f2ba00.png)
