We had a minor issue upgrading eB2.1SP4 to 10.1C, where a new keyword (CAST) was introduced.
This caused a few QAD programs to fail to compile: ffcalca.p, ffcalc02.p, ffcalc03.p, ffcalc04.p, ffcalc05.p and ffcalvar.i. QAD has an out-of-the-box patch for this.