Build 3.5.0.21 of xlsgen has another fix for the calculation engine, related to mimicking Excel for handling undefined names in formulas.

Until this build, xlsgen would return a #NAME? error whenever calculating a formula where somewhere down in the calculation tree, an undefined name is being referred to.

Excel however thinks differently, and does not necessarily mark or signal such an error : it does only under certain ciscumstances, for instance a case including IF() code branch is being executed, while the other code branch with an undefined name isn't. xlsgen mimics Excel in this regard.