NPAXSMOD 85 Fallback file header does not contain the correct block size parameter.
Explanation:
If the initialization string assigns a fallback file and the fallback file is found with a block size that does not match that specified in the initialization string, this message is logged at level 2 and an error is returned in response to the File Open command. If a fallback directory is specified, this message is logged at level 5 and the file is ignored.