Forms compilation errors parameter.G_query_find

Recently all custom forms compilation failed with errors like these:

FRM-18108: Failed to load the following objects.

Source Module:APPSTAND
Source Object: STANDARD_PC_AND_VA
Source Module:APPSTAND
Source Object: STANDARD_TOOLBAR
Source Module:APPSTAND
Source Object: STANDARD_CALENDAR
Compiling package specification APP_CUSTOM...
No compilation errors.

or

Compiling KEY-NXTBLK trigger on QUERY_FIND data block...
Compilation error on KEY-NXTBLK trigger on QUERY_FIND data block:
PL/SQL ERROR 49 at line 1, column 1
bad bind variable 'parameter.G_query_find'
PL/SQL ERROR 49 at line 1, column 1
bad bind variable 'parameter.G_query_find'
PL/SQL ERROR 49 at line 3, column 1
bad bind variable 'parameter.G_query_find'

It turned out that FORMS60_PATH was not set correctly. Whenever forms are compiled FORMS60_PATH is set to:

FORMS60_PATH=$FORMS60_PATH:$AU_TOP/forms/US:$AU_TOP/resource

In context file it was set as:

$AU_TOP/resource:$AU_TOP/resource/stub

After correcting this and compiling manually it worked. To make this permanent change the s_f60path to include $AU_TOP/forms/US:$AU_TOP/resource