File save error (IOException)

[DivanGrundlingh]

I keep getting this error when I try to run the batch process. I pick an input directory and output into a different file but still gives me this. The output directory has no files inside and the input directory only has .tif files. Could you please help me understand this?

[IBMTRostock]

I can't reproduce the error, so maybe some general advice might help. Tif-files are ok.
You may create two new folders for input and output, and try them.
Please update ImageJ to the newest version, older versions sometimes cause undenoted error messages.
If you use ImageJ, you may switch to Fiji (https://imagej.net/software/fiji/downloads), which is a more comprehensive version of ImageJ. If the error continues to occur, please let me know.
kind regards
A G