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Re: [Help-glpk] csv_driver:unable to create ....csv - Permission denied

From: Michael Hennebry
Subject: Re: [Help-glpk] csv_driver:unable to create ....csv - Permission denied
Date: Tue, 6 Jan 2015 14:21:31 -0600 (CST)
User-agent: Alpine 1.00 (DEB 882 2007-12-20)

On Tue, 6 Jan 2015, Martin Albrecht wrote:

I am running a GLPK model that is sequentially started from a frame program in Java.

In this contex, what is a frame program?
What OS are you running?

Unfortunately,  I get sometime error when opening the .csv files.
Here is an example:
csv_driver: unable to open BOM.csv - Permission denied
allocation.mod:113: error on opening table tab_BOM
glp_mpl_build_prob: invalid call sequence
Error detected in file ..\src\glpapi14.c at line 93/

I do not get this error at each call of the Java model (one error after approx. 50 calls). Moreover, these errors do not occur in a deterministic manner, they cannot be reproduced. I each run of the Java program they occur at another place.

Looks like a thread issue to me.
Do the open and close occur in different threads?
Perhaps the open is attempted before the close has gone through.

Michael   address@hidden
"SCSI is NOT magic. There are *fundamental technical
reasons* why it is necessary to sacrifice a young
goat to your SCSI chain now and then."   --   John Woods

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