CTLR EXPECTS COMMUTER TO FLY DIFFERENT RTE THAN CURRENT CTR STORED RTE.

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COMPANY IS A SCHEDULED ACR OPERATING LTT'S WHILE OPERATING FLT ON FEB/XY/92 FROM JMS TO GFK; ZMP STATED IT'S A GOOD THING NO OTHER ACFT ARE FLYING IN ND; BECAUSE I'M SHOWING YOU GUYS OFF COURSE; DO YOU NEED A HDG FOR GFK.' I STATED THAT WE ARE ON COURSE AND ARE PROCEEDING AS FILED; WHICH IS JMS-V170.JMS 343021.V55 GFK; PREPARED JAN/XX/92 AND EFFECTIVE FEB/XX/92 AS PER COMPANY MEMORANDUM AND OPS MANUAL. THE OLD FLT PLAN IN WHICH ZMP HAD WAS FILED JMS DIRECT GFK. I RELAYED THIS MESSAGE TO CTR AND HE SAID 'OK; MUST BE IN THE COMPUTER SOMEWHERE; AND THERE WILL BE NO PROBLEM.' COMPANY OPERATES 26 FLTS BTWN GFK AND JMS-JMS AND GFK PER WK; AND THERE HAS BEEN NO CONFUSION IN THE ZMP COMPUTERS ALONG THIS RTE UNTIL THIS FLT. I HAVE CHKED WITH COMPANY OPS; AND THEY HAVE ALSO VERIFIED IT WAS CHANGED IN THE COMPUTERS. I CONSIDER THE ZMP FLT PLAN FILES AT FAULT IN THIS SITUATION AND I CONSIDER IT UNSAFE. I FIND IT UPSETTING TO RECEIVE A CLRNC THROUGH FSS AND HAVE IT DIFFER FROM THE ONE THAT CTR HAS IN HIS COMPUTER. I THINK OLD FLT PLANS NEED TO BE DELETED FROM COMPUTERS AND NOT LEFT TO SURFACE AS IN THIS SITUATION. THIS COULD CAUSE A GRAVE DANGER IF OTHER ACFT ARE OPERATING ALONG THIS RTE; DSNDING OR CLBING; WHILE THE CTR HAS A HVY LOAD. MY AIRLINE USES CANNED FLT PLANS WHICH ARE UPDATED OFTEN AND IN WHICH FLCS DEPEND ON. TO FURTHER THE SAFETY OF MY CREW AND PAX I WILL REQUIRE AND REQUEST FULL RTE CLRNCS TO AID IN LACK OF COMPUTER COMS IN THE SYS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THIS IS NOT AN ONGOING PROBLEM. FLEW NEW RTING BEFORE AND AFTER THE INCIDENT AND HAS HAD NO PROBLEMS. COMMUTERS FLY THE SAME RTES SO OFTEN; RPTR FEELS CTLR MAY HAVE JUST BEEN SO FAMILIAR WITH FORMER RTE HE DID NOT CONNECT WITH THE NEW RTING.