We too were confronted with these errors and error messages with all the

described consequences. After recording all the error messages with date

and documentation of the circimstances, and after trying all the hints
we got
from Finnigan we contacted Bremen again.
The remedy: We got the newest version of ISODAT, replaced our PC with
a UNISYS 66MHz and changed to the operating system REAL 32.
Since then it works and the error messages have practically disappeared.

My suggestion: install REAL 32 and the newest Version of ISODAT
from scratch (NO patches etc) and you will most likely have peace.
Make sure your PC hardware is OK, clones and cheep brand products
might be an other source of problems.

Good Luck

Rolf



 Kendra Turk wrote:

> Hello all,
>
>         On five separate occasions in the last month or so, we have
> had overnight EA sequences halted due to one of two ISODAT errors:
>
> Modul # 33283
> Error # 90
> RT: Devision by zero (Z)
> Adr: 419
>
> and
>
> Modul# 20133
> Error #6
> RT: Bounds exceeded (B)
> Adr:955h
>
>         I have received the former message in scenarios where no
> sample or reference gas peaks were detected.  In this case, however,
> behind the error message, peaks in both the ratio and isotope traces
> have been clearly visible.
>         More baffling, however, is the latter error message.  In the
> case where I have observed this misbehavior, the sample was combusted
> and the nitrogen data was acquired as expected.  It was during the
> CO2 analysis that this message occurred.  Despite the absence of the
> 44 and ratio traces,the software stopped the data acquisition at the
> designated time, and choked when there was no data.
>         If anyone has experienced anything similar, or has some sort
> of idea what could cause such errors, please contact me directly...
>
> Thanks,
> Kendra
> _________________________
>    Kendra Turk
>    NASA/Ames Research Center
>    Mail Stop 239-4
>    Moffett Field, CA  94035
>     650-604-1430 (voice mail)
>     650-604-6110 (lab)
>    [log in to unmask]

--
_______________________________________________________

 Dr. Rolf Siegwolf
 Laboratory of Atmospheric Chemistry
 Stable Isotope Research Group / Ecosystem Fluxes
 Paul Scherrer Institute
 CH-5232 Villigen-PSI
 Switzerland
 Phone  : +41 (0)56 310 27 86
 Fax      : +41 (0)56 310 45 25
 e-mail  :  [log in to unmask]
_______________________________________________________