LS Retail Replication from NAV 5 to Navision Financials 2.60

Dear Users,

One of my customers is going for upgrade from 2.6 to 5.01.

As in retail, they are updating the new version 5.01 in stores but still head office is on old version 2.60. I am replicating from 2.60 to 5.01 with no issues but when i replicate from 5.01 to 2.60 I get an error.

“PlusCFrontClient:usecodeunitspermissions Autom.server has stopped or timedout occurred.”

thanks and regards,