I have an infopath form, in the field "incomplete" set a default value, the default value is a formula, the formula is as follows: "(((number (depreciation period) * 12) - ((translate (substring (now (), 0, 6)," - ", "") and translate (substring (storage time, 0, 6)," - ", "")) * 12 + (substring - after (translate (substring (now (), 0, 9)," - ", "") and translate (substring (now (), 0, 6)," - ", "")) - the substring - after (translate (substring (storage time, 0, 9)," - ", "") and translate (substring (storage time, 0, 6)," - ", ""))))) * purchase amount)/(number (depreciation period) * 12)", after running workflow, to judge if the salvage value calculated value greater than 0 the cycle running until the residual value is less than or equal to zero, but after tests found that even if the salvage value is zero, the workflow still running without stop,

Remove the value as a variable, found that although the form of the value is less than or equal to zero, but the workflow of variables has been no change, only after the edit form again to save changes,