[gmx-users] Fatal error receive by running Hessian matrix

[Collins Nganou]

Dear users.

greetings.

after minimization, when I change integrator = md by integrator = nm and
adding

nstvout = 500 and  gen_vel =  yes  I receive the following error:

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Back Off! I just backed up md.log to ./#md.log.15#
Reading file 3ns.tpr, VERSION 3.3.1 (single precision)
NOTE: This version of Gromacs has been compiled in single precision,
      which MIGHT not be accurate enough for normal mode analysis.
      Gromacs now uses sparse matrix storage, so the memory requirements
      are fairly modest even if you recompile in double precision.

Non-cutoff electrostatics used, forcing full Hessian format.
Allocating Hessian memory...

-------------------------------------------------------
Program mdrun, VERSION 3.3.1
Source code file: smalloc.c, line: 113

Fatal error:
calloc for full_matrix (nelem=-707915632, elsize=4, file minimize.c, line
1854)
-------------------------------------------------------

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Thanks for all response
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