The documentation for open states:
If FILEHANDLE is an undefined scalar variable (or array or hash element), a new filehandle is autovivified, meaning that the variable is assigned a reference to a newly allocated anonymous filehandle. Otherwise if FILEHANDLE is an expression, its value is the real filehandle. (This is considered a symbolic reference, so use strict "refs" should not be in effect.)

You initialize $fh with LF. Under strict, all three options produce the expected error:

Can't use string ("LF") as a symbol ref while "strict refs" in use ...
The real question is why do options 0 and 1 appear to work as intended without strict. I have no idea.

The minimal (not recommended) 'fix' is to remove LF from the call to mystart. This leaves $fh uninitalized. 

#&mystart($LumberFile,LF);
 &mystart($LumberFile);

[download]
Bill

In reply to Re: Filehandle in subroutine in use VRML.pm by BillKSmith
in thread Filehandle in subroutine in use VRML.pm by smittypaddler

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