ODBC Connection strings for older iseriesaccess / error preparing SQL with ibm-iaccess-1.1.0

Hello,

for quite some time now, I'm using ODBC from Linux to connect to my model 150 running V4R5. To isolate a minor glitch with character fields coming back being padded with blanks to their maximum length, I wanted to see if this behavior can be adjusted by telling the ODBC driver accordingly. Apparently TrimCharFields isn't known for the older iseriesaccess 7.1.0 ODBC driver I'm currently using.

https://www.ibm.com/docs/en/i/7.3?topic=details-connection-string-keywords

So I tried a newer driver, ibm-iaccess-1.1.0. Connection works flawless but I get an error while preparing a simple SELECT:

[IBM][System i Access ODBC Driver][DB2 for i5/OS]PWS0001 - Function did not complete successfully. (SQL-HY000)

This is consistent with an earlier try: https://archive.midrange.com/midrange-l/202108/msg00487.html

Apparently, the newer driver has issues with older OS/400 releases. Sigh.

I tried to search for documentation about the valid connection strings for the iseriesaccess 7.1.0 ODBC drivers, but failed. Anybody knows a source?

Thank you!

:wq! PoC