The drag and drop is working fine with other batch processes.
For instance if I what to extract by mask I can drag and drop multiple Mr.Sid files into the input raster column.
When attempting a batch process with ISO unsupervised classification, I can only put the rasters in the output raster field. I get the circle with slash symbol not allowing me to drop into the input field. Even trying this with different raster data I have the same issue.
Other batch processes seem to be working fine with the Mr. Sid files. I'm only having the issue with the ISO unsupervised batch process. The ISO Cluster (Spatial Analyst) will allow me to drop into the input raster field but puts them all in one row. Maybe that is how that tool is supposed to work, at least it allows the input to go into the input field. Unfortunately I do not want to use this tool.
For now, I've been getting around the issue by dropping the Mr. Sids into the output raster field, copying to excel, moving the Mr. Sids to the input field, then it pastes back into the ISO cluster unsupervised classification input raster field just fine. And the tool runs and gives me the output I expect. Just don't understand why I can no longer drop into the input field.
I definitely did not have this issue a few months ago.
I looked at the link you sent and does not seem to be the same issue.