Yanhua ACDP Server Calculations has Exceeded the Limit?

Problem:

I'm trying to read isn from Msv80 with Yanhua Mini ACDP and interface board. ACDP gave an error "number of server calculations has exceeded the limit". Acdp server problem?

Solution:

MSV90\MSV80\DPS6 etc kind of DMEs need a server calculation that's special. After 6 times calculation it's shuts you down. You need to try next day.