Thanks BobO.
I actually got it working by using a STRPRINT instead of STRPUTB. My data view showed hex 00 C6, but that's apparently not what was getting to the STR2INT.
I went with - STRPRINT, no space added, FmtInt(REMBuff23,hex) FmtInt(REMBuff24,hex) and my STR2INT started working.
So, STRPUTB to SS121, index 0, length 2, starting element RemBuff23 does not yield the same output string.
Thanks again!!