I am having a strange problem. I am getting the following error (debug
included). The populate-last-travel-day rule fires based on the presence of
facf-5 (among others). The error is thrown in the rule body where I try to
modify f-5. I am not sure how the fact cannot be in working memory as
Most likely the problem is that some of your classes (perhaps
com.ngc.dts.domain.common.PerDiemEntitlement) have mutable hash codes,
making them unsuitable for use as keys in a hash table (try using one
of these objects as a key in a HashMap, change the values of some
properties, then try to look
