Dear All, I am observing some data import related issues in 3.16.3/4 version but when i imported same record in 3.14.5 it worked fine and everything goes well approx 60 thousand record. Now in latest version when i am importing, it stuck at some point/% and ultimately i got error message. The structure of my record is almost similar to below one, I feel their may be some more strict data validating rules in latest version of Koha which cause this problem but my marcedit software does not shows any error during validating the records. Please suggest the reasons and how to overcome this situation. =LDR 00500nam a2200157Ia 4500 =020 \\$a9781439849965 =008 131118s2010\\\\xx\\\\\\\\\\\\000\0\eng\d =041 \\$aeng =082 \\$a610.28$bPAL/C =100 \\$aPalmer, Ella =245 \\$aCell-based microarrays: methods and protocols =260 \\$aNew York$bDhumana Press$c2010 =300 \\$a505 =490 \\$aADVANCES IN MATERIALS SCIENCE AND ENGINEERING =942 \\$cREF =952 \\$p64364$o610.28 PAL/C$yREF$g99.95US$aMAIN$bMAIN$cREF With regards, Vinod Kumar Mishra, Assistant Librarian, Biju Patnaik Central Library, NIT Rourkela, Mob:91+9439420860 91+6612462103 (O) email: vinod_librarian@rediffmail.com : mishravk79@gmail.com