|no, i don't think. because /c wants an immediate argument (a literal expression):|
findstr /c:"this text to find" targfile
in this case:
FINDSTR /m /c:"RC (return code) = 0" "%ddlDir%\%filenm%_Log.txt"
consult: findstr /?
for all findstr options /switches. I'll admit, they can be confusing, so... experiment!