In experiment 5-12-292 we initiated our studies of the crystal structure of the important fungicide, Cyprodinil, which shows polymorphism derived from different intermolcular hydrogen bonding patterns. This polymorphic behaviour is highly important to commercial use and application of this material, as one form undergoes a slow conversion to the other upon storage, causing particle aggregation. In the initial experiment we were able to collect excellent data on Form A at 20 K and 298 K and determine accurate parameters associated with the intramolecular hydrogen bonding. However due to the sample cooling problems and a reduced experiment scheduled allocation we did not have time to study Form B. In this continuation experiment we request 4 days beam time to complete our study of hydrogen bonding and polymorphism in cyprodinil - and so elucidate the reasons for the polymorph interconversion .