The maximum number of column names that can be specified in the OUTCOLS keyword of the OPSLOG function is 50. The total number of available display columns is currently at 56, with 2 of those columns not supported by the OPSLOG function (CART and CARTX). Error messages OPS1940E and OPS1955E are generated when the OUTCOLS keyword contains more than 50 entries/column names. We will update the documentation for the OUTCOLS keyword of the OPSLOG function.
Thank you Marcel for pointing this out.