[gmx-users] error oxo

s lal badshah shahbiochemist at yahoo.com
Tue Mar 25 10:06:47 CET 2008

Dear experts,
Hi! I see the following on the site:
Error 0x0 and 0x1       From FaHWiki              Jump to: navigation, search
       The 0x0 and 0x1 errors are unknown errors - all errors that are known will end with some other  error code and message, but those errors that Pande Group hasn't seen before or did not know about, will end with error 0x0 or 0x1. 
Note: The WU data of an unknown error can not be trusted and by definition you'll never get any credit for it. If the 0x0 and 0x1 error cause is identified and classified as some sort of EUE then you'll start getting credit for such WUs. One possible cause of errors 0x1 and 0x0 is a hardware failure (which is why the software is unable to classify them). If a RAM failure is detected by the OS or for some reason the program wishes to allocate more memory and the OS refuses, the OS will terminate FAHcore_* and the client will no longer be able to communicate with the FAHcore producing Client-core communications error: ERROR 0x1  
0x0 errors are Unix Specific and under Linux this error often can be related to Glibc incompatibility.
Note: When using the Gromacs core on Linux, this error is also generated in circumstances where the Windows core would produce a "Gromacs Cannot Continue further" EUE. Unfortunately Pandegroup are currently unsure how WUs are triggering this error. As a result a normal EUE is not triggered, and the whole WU gets dumped and lost. Folding-community: Guha Jayachandran's comment in "Core status 0?" 
Under the Gromacs33 (A0) core, this error is returned because even though the cause is known, it has not yet been categorised. The error creates an output in the log similar to this: 
Warning: 1-4 interaction between  and  at distance 0.000 which is larger than the 1-4 table size 8.298 nm

 One possible cause for error 0x0 is forgetting to redirect the standard output. If you're running in the background without a command such as './fah5 -verbosity 9 >/dev/null 2>&1 &', the simulation will probably get past 100% and then create an error. 
These are ignored for the rest of the simulation
This usually means your system is exploding,
if not, you should increase table-extension in your mdp file 

 It should be noted that you yourself cannot increase the table-extension, it is an integral part of the WU 
Error 0x1 is not always an "unknown error"  When a WU expires, you may receive this error: 
As I have the Lincs error.Is my problem related to this type? As I am using Suse linux and I added  directly the gromacs software to Installation packages.
Lal badshah

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