The system detected that in an IF statement, the keyword THEN, or the entire THEN clause, is missing. The checking of the statement is ended.
If the error recurs and the program is not in error, search problem reporting data bases for a fix for the problem. If no fix exists, contact the IBM® Support Center. Provide all printed output and output data sets related to the problem.
Correct any errors in the PL/I source statement and let the syntax checker scan it again. Compile the statement as part of a valid program.
Programming Language/I (PL/I)