ERROR999999 Region group tool

Question

i keep getting the following error when trying to run the region group tool. Can someone assist please.

ERROR 999999: Error executing function.
The table was not found. [VAT_name]
A column was specified that does not exist.
A column was specified that does not exist.
ERROR 010005: Unable to allocate memory.
ERROR 010067: Error in executing grid expression.
Failed to execute (RegionGroup).

CarlosRibeiro · Answer

It will fail if input raster is stored in FGDBR format (geodatabase), either executing Region Group in ArcMap/ArcCatalog 10.7.1 or ArcGIS Pro 2.4.

If input raster is stored in ESRI grid format (in a workspace), it wil run like a charm. It took ~118hr to identify ~20 million groups from a raster having 14,951x12,704 8bit cells...

This also works fine in ArcGIS Pro 2.4 if your input data is a TIFF image. However, the performance will be a bit slower (~120.5hr) .

AnnahNdeketeya · Answer

Thank you Neil. it worked with Pro.

DanPatterson_Retired · Answer

Ensure it is and integer raster.

Better still, export the raster to a *.tif file using Copy Raster.  If that doesn't work, cut a chunk out (say 1/4) and use it to see if it is a file size issue.