I'm looking for a little help on a problem we can't figure out with some DSL errors during a build. We're working with version 5.3.0.Final on RSA 7.5.5. The offending line of DSL is on the rule is: Write qualifyingPoints on Result as $var01 * $var02 $var01 and $var02 are variables set in the WHEN part of this rule. The offending line of code is translating to: modify (Result){qualifyingPoints = $var01 * $var02}; When I execute the program that calls this rule, if fails during the build process with the following: Unable to Analyse Expression @Modify with (Result){qualifyingPoints = $var01 * $var02 }; [Error: java/lang/String.isEmpty()Z] [Near : {... @Modify with (Result){qualifyingPt ....}] ^ [Line: 1, Column: 9] : [Rule name=Qualifying Points rule 1'] If I modify the code to use an assignment and update instead of modify, it will build without an error: Result.setQualifyingPoints( $var01 * $var02 );update (Result); Note that we only see this behavior on RSA. We do not see it on Eclipse (but we need to use RSA). I didn't find anything online so I thought I'd check to see if this is something someone has seen before. Thanks!