Has anyone else encountered this problem?
I've already found a workaround for this issue, but it's less than ideal.
Using the reclassify tool (Spatial Analyst), I was reclassing a raster that created from a polygon feature class.
The raster had a value in each cell within the polygon, and a NODATA everywhere else.
Using the reclass tool in ArcMap, to change these NODATA cells to have a real value, worked fine.
Using the reclass tool in ArcGIS Pro, however, using the same feature classes, failed when I did this, with this error:
ERROR 999999: Something unexpected caused the tool to fail. Contact Esri Technical Support (http://esriurl.com/support) to Report a Bug, and refer to the error help for potential solutions or workarounds. Failed to execute (Reclassify)
what did you use for the ... missing_values ... parameter?
You might want to have a look at this updated and recommended workflow for using Reclass for rasters.
It might provide some illumination on potential pitfalls and differences between arcmap and Pro
Which version of pro arc you using? Is it reproducible in Pro? If so, please either submit a tech support incident or post your data and precise steps to repro to this thread.
PS: Also double check your current GP environments (cell size, output sr, output extent, snap raster). Make sure they are what you intended.