During execution of one of the NLP subproblems or in DICOPT during a linearization the Domain Error Limit was hit. Reset the GAMS DOMLIM option, or provide better bounds so that the non-linear functions and their derivatives can be evaluated. CONOPT may also raise this error when the derivatives are becoming too large. CONOPT will send a message to the screen or logfile. Another indication is that the number of evaluation errors is less than the limit. If in doubt use OPTION SYSOUT=ON; which will echo CONOPT messages to the listing file.