Weird RNX0103 error with no apparent cause

We are seeing an RNX0103 error on a customer box, and the statement number given in the message details doesn't make any sense.

The message says that the error point is at statement 9120, but all we have there is:

9116 /END-FREE
9117 C MOVEL 'ARRIVED' CLPKEY
9118 C MOVE xCompDate21z CLPKEY
9119 C Z-ADD 0 CLPRETCD
9120 /FREE
9121 CLEAR CLPDATAR;
9122 WRITE WTCLOGR;
9123 ENDIF;
9124 /END-FREE

Does anybody have any insights into this? About all this block of code tells me is that somebody else took the ill-conceived initiative of converting large blocks of code to /FREE format.

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JHHL