[Koha] catalogue problem

Hi, please help me out on this, i have been running koha 228, which has a few 229 upgrades. I experienced a problem with the display of the MARC records, when i search the catalogue i am able to see the content, but when i click on any of the items it simply gives me a blank page with the marc number that the record is. On trying to back up using mysqlyog, it gives me an error Error.: No 1016 Cant open file : "marc_subfield_table.MYD.' (errno:145) Any assistance on how to correct this will be appreciated.