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as mentioned in #8 (comment 3112) writing objectives like (where d1 and d2 are design variables):

//obj1:OBJECTIVE,EXPR="fabs(d1+d2)";

seem not to work (not sure if it ever did). Since the optimiser still tries to look in the output file:

Exception while getting value from SDDS file: unkown column name!

Still such an objective could potentially be useful.

I might have a look at this eventually, or if there is a direct need for it. Right now putting a low weight on it.