CL Parameters sharing memory?

[Kurt Anderson <kurt.anderson@xxxxxxxxxxxxxx>]

I tried really hard to figure this one out on my own, but am coming up short.

I'm on v5r4.

I have a CL that submits a CL, and it appears two of the parameters are sharing a location in memory.  Is there a limitation on the size of a field that can be submitted to a CL?  I tried searching online but wasn't finding anything.  I can get around this situation by putting the big parameter last, but I wanted to understand why this is happening.

So when I pass a 45a and a 1a variable, the 45a variable contains both values:
&CNAME   = kurt test                        N

Here's my source:

TESTCL1
             PGM
             DCL        VAR(&CNAME)     TYPE(*CHAR) LEN(45)  Value('kurt test')
             DCL        VAR(&V51)       TYPE(*CHAR) LEN(1)   Value('N')

             SBMJOB     CMD(CALL PGM(TESTCL2) PARM(&CNAME &V51))
             ENDPGM

TESTCL2
             PGM        PARM(&CNAME &V51)
             DCL        VAR(&CNAME)     TYPE(*CHAR) LEN(45)
             DCL        VAR(&V51)       TYPE(*CHAR) LEN(1)

             SNDMSG     MSG('&V51 = ' *CAT &V51) TOUSR(KURT)
             SNDMSG     MSG('&CNAME = ' *CAT &CNAME) TOUSR(KURT)
             ENDPGM

Thanks,
Kurt Anderson
Sr. Programmer/Analyst
CustomCall Data Systems