[pups] Memory Error 46 on a PDP 11/73

Hello, I am getting the following error when I try to boot my PDP. The Card details for the CPU and the Memory Board are as under. Here are the details of the Various cards. Slot 1(ABCD) KDJ11-BB (M8190) Slot 2(ABCD) MSV11-QA(M7551) Slot 3 (AB) M3107 Slot 3 (CD) Blank Slot 4 (AB) Solna prinitng machine card Slot 4 (CD) BIT Scandiavia card Slot 5 (AB) Blank Slot 5 (CD) M7555 Can some one please guide what I can do besides replacing the old card with a new card. Regards, Shroff Testing in progress - Please wait 1 2 3 4 5 6 Error 46 Memory Error See troubleshooting documentation Error PC = 173242 PCR page = 15 Program listing address = 015242 R0 = 060000 R1 = 125252 R2 = 125652 R3 = 052525 R4 = 001000 R5 = 040000 R6 = 172300 Par3 = 034000 Expected data = 125252 Bad data = 125652 Address = 03400000 Command Description 1 Rerun test 2 Loop on test 3 Map memory and I/O page Type a command then press the RETURN key: 3 Memory Map Starting Ending Size in CSR CSR Bus Address address K Bytes address type type 00000000 - 03777776 1024 17772100 Parity Qbus Press the RETURN key when ready to continue I/O page Map Starting Ending Address address 17760440 - 17760456 17765000 - 17765776 CPU ROM or EEPROM 17772100 Memory CSR 17772150 - 17772152 17772200 - 17772276 Supervisor I and D PDR/PAR's 17772300 - 17772376 Kernel I and D PDR/PAR's 17772516 MMR3 17773000 - 17773776 CPU ROM 17777160 - 17777166 17777520 - 17777524 BCSR, PCR, BCR/BDR 17777546 Clock CSR 17777560 - 17777566 Console SLU 17777572 - 17777576 MMR0,1,2 17777600 - 17777676 User I and D PDR/PAR's 17777744 - 17777752 MSER, CCR, MREG, Hit/Miss 17777766 CPU Error 17777772 PIRQ Press the RETURN key when ready to continue I/O page Map Starting Ending Address address 17777776 PSW Press the RETURN key when ready to continue Error 46 Memory Error See troubleshooting documentation Error PC = 173242 PCR page = 15 Program listing address = 015242 R0 = 060000 R1 = 125252 R2 = 125652 R3 = 052525 R4 = 001000 R5 = 040000 R6 = 172300 Par3 = 034000 Expected data = 125252 Bad data = 125652 Address = 03400000 Command Description 1 Rerun test 2 Loop on test 3 Map memory and I/O page Type a command then press the RETURN key: