[Info-vax] Error Messages in Basic - %BASIC-E-PARMODNOT, mode for parameter <n> of routine <procedure-name> not as declared

[abrsvc]

It has been a while since I did Basic coding, but most parameters are passed by descriptor right?  Parameter 2 for LIB$CONVERT_DATE_STRING requires passing by reference as does parameter 3.  This might be the problem.  

Similarly both parameters to LIB$DAPY_OF_WEEK require passing by reference.

I'd start there.