# PARAM, NLMON

Bulk Data Entry This parameter activates Nonlinear Results Monitoring. Currently, only displacement results monitoring is available.

Parameter Values Description
NLMON <DISP, NO>
Defaults:
• If the parameter is not present in the model, the default is NO.
• If the parameter is present in the model with no values specified, the run will terminate with an error.
DISP
Nonlinear solution generates displacement monitoring results in a second H3D file during runtime.
If the input file is named filename.fem, this second H3D file with monitoring results will be named filename_nl.h3d. Every iterative result in every increment performed until this point in time will be saved in this file.
NO
The extra _nl.h3d file is not output.

1. The generated _nl.h3d file and diagnostic information in the _nl.out file can be further analyzed using the script os_out_file_parser.tcl. For further information on using this script, refer to the NLMON Bulk Data Entry.