[LON-CAPA-admin] Perl Script Function "ln" supported?

Lucas, Mark lucasm at ohio.edu
Mon Nov 19 14:51:21 EST 2012


I was just getting ready to ask about this. We had this pop up just last night.

We had an instructor start getting 'bombs' on a problem that uses ln().

It did not get caught in construction space.

I just checked out a problem and I get the error messages on all our access
servers when I log in as a student and check out problem, but I don't get the
message on our library servers when I do the same thing. I also, as stated
above, do not get the error message in construction space (necessarily in
construction space).

What is different about perl on the library servers? One of my library servers
is 64-bit (Centos5.3) and the other is 32-bit (Centos 5.3).


On Nov 19, 2012, at 12:59 PM, Stefan Bisitz wrote:

> Hi,
> The perl script function "ln" (not "log" or "log10") seems to be 
> supported by LON-CAPA, but not officially. The Script Functions help 
> doesn't list it and it's not a perl function.
> The issue:
> Some LON-CAPA servers do not support "ln" and complain "Undefined 
> subroutine &main::ln ..." while others calculate the correct value.
> So, why does it work on some servers? Should it work on all? If so, why 
> isn't it currently?
> Any hints?
> Thanks,
> Stefan Bisitz
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Mark Lucas 								email: lucasm at ohiou.edu
252D Clippinger Lab						phone: (740)597-2984
Department of Physics and Astronomy		fax: (740)593-0433
Ohio University
Athens, OH 45701

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