Synopsis
This is an error in the way the REXX script is written.
Cause
There is the opening quote mark " without the closing quote mark.
Cure
Count the opening and closing quotes and make sure that there are the same number of each. If you're using a double quote inside of a string, for example, to express a quotation, then make sure that you use single quotes around the whole string, for example:
'"This is a quote.", he said.'Or use duplicate quote characters, back to back, where you want one quote character, for example:
"""This is a quote."", he said."