Patch :13006289:R12.AP.B:Microsoft Windows x64 (64-bit):12.1.3:fails with error :Error occurred in v

Hi,
The following error occurred during application of patch:13006289:R12.AP.B

Performing version checking...
Cannot open patch file:
E:\ERPDEV\inst\apps\ERPDEV_ardcvdep1\admin\scripts\ap\patch\115\import\US\ap12diag.ldt

Error occurred in version checking.
See above error messages or AutoPatch log file for details.
Exiting AutoPatch...
Freeing includes hash table
Freeing fixes hash table
Freeing basedons hash table
Freeing entities hash table

You should check the file
E:\ERPDEV\apps\apps_st\appl\admin\ERPDEV\log\adpatch.log

Thanks & Regards
phani bhaskar