I have an Arduino Uno loaded with DCCpp_Uno, motorshield, mains track and ops track both working well with JMRI version 4.6-R81496dc. When using the "Simple Programmer" on ops track I can write one cv succesfully. However a subsequent value cannot be entered: the value field keeps reverting to the originally entered value. The only way to enter a new value is to close the "Simple Programmer" and restart it. Is this a bug in JMRI? Or in the DCCpp_Uno program?