W-8347/8747, uPAC-7186EG, I-8x37-80, I-8xx7 and I-7188EG/XG with S256/512 and X607/608 no longer support previous retain variable, will continue to support the new retain functions.For more detail information about the new retain function, please refer to ISaGRAF FAQ074 and FAQ088:www.icpdas.com > FAQ > Software > ISaGRAF > 074 and 088