When running a geoprocessing tool, ArcMap returns the following error message:
Error 000229: Cannot open <value>.
This error message indicates the data required by the geoprocessing tool is unavailable or invalid. However, the error message can display when the data is valid and accessible if background geoprocessing is enabled.
This error message displays when the following occurs:
When background processing is turned on, scripts execute using 64-bit background processing. ArcMap is unable to read data types not supported by 64-bit background processing, while tools incapable of running in the background cannot leverage 64-bit processing. By default, ArcMap and ArcCatalog communicate through a 32-bit client library.
Confirm that the data exists and has been specified correctly. Also confirm that the data can be accessed through other means, such as being able to navigate to the dataset in the Catalog tree.
Execute the tool in the foreground by disabling background processing, or uninstall 64-bit background geoprocessing.