I am not 100% sure of what I am writing below.
Looking at the input file size, it's around 20 GIGS.
When CMOD process a report, it stores the data in storage objects.
You can configure the storage object size in the Application Group.
As per the message, it looks like CMOD is having problem in allocating the next storage object name when one storage object is full.
In the message below, '3091FAA' is the storage object name.
As per the suggestion in the message, increase the storage object size from the default of 10 MB may help.
Cheers
Pankaj.