I have a situation where some lines in my code-generated timport source files are apparently too long for the TIMPORT utility. When TIMPORT encounters these lines during the loading of the data, an ABEND is generated. The issue is not with too much data per record, nor (I don't think) too much data in any one field. The problem is just excessively long lines in the source text files themselves. I can easily change my source file generation code to break these lines into multiple shorter lines, but I don't know what the maximum length of a line should be. The longest line I've encountered so far >100K characters, which apparently is too long.
All I can think of is older versions with csv data that might cause that. What's your data format? csv or something else?
What's your timport version and release reported by timport -h ?
I don't see any reason it shouldn't work in that version. But the allocation unit is 30000 bytes so you might try line lengths shorter than that. But I doubt that will change anything since it's the length of the entire record that I would expect to matter.
If it still doesn't work you may need to open a ticket with your schema and some sample data.