missing:..........appl/alr/11.5.0/admin/driver/alrfile.drv

I have certain patch to apply in my system, but unfortunately adpatch is coming out with following error for any patch.
Determining valid on-site files...
AutoPatch error:
The following file is missing:
..........appl/alr/11.5.0/admin/driver/alrfile.drv
AutoPatch error:Error reading product file driver files complete; make tapes
AutoPatch error:Error determining valid on-site files
You should check the file..........................appl/admin/SID/log/logfile.log for errors.

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No answer in metalink for this. I did find for alrfile.drv in my system and did found the file in $APPL_TOP/amf/alr/11.5.0/admin/driver/alrfile.drv, just created softlink for alr under $APPL_TOP like
ln -s amf/alr alr
and reapplied the patch and it worked.

Happy Troubleshooting !!!