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MODFEM NEU
File conversion

Convert MODFEM to NEU

Verified by Adam B.· reviewed by FE Editorial ·updated Jul 9, 2026
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Is it possible to convert MODFEM to NEU?
Yes - MODFEM converts to NEU.

Open the .modfem and use File > Export > Femap Neutral, choosing which portions of the model to write and, if needed, an older Femap version for compatibility. The .neu is an ASCII neutral file that captures geometry, mesh, properties, loads and other model data for transfer between Femap versions or into other programs.

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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Why convert MODFEM to NEU?

The .modfem database is binary and tied to a Femap release, so it is not ideal for archiving or sharing. The Femap neutral .neu file is a platform-independent ASCII format that Femap recommends for long-term storage and for exchanging models with other Femap versions and third-party tools.

How to convert MODFEM to NEU

Simcenter Femap - Export Femap Neutral

Open the .modfem and run File > Export > Femap Neutral. Select the model portions to include; Femap writes a portable ASCII .neu file.

Export to an older Femap version

In the neutral export dialog pick an earlier version number so the .neu can be read by an older Femap (a current-version .neu cannot be opened by much older builds).

About these formats

.MODFEM Femap Model File

A .modfem file is the native model file saved by Femap (now Simcenter Femap), the finite element analysis pre- and post-processor from Siemens. It stores a complete FE model in one binary…

Open .MODFEM details →
.NEU Pro/Engineer neutral file

A .NEU file is associated with Pro/Engineer neutral, a cad file.

Open .NEU details →

Quality & what to watch

  • A .neu written by a newer Femap cannot be read by a much older version unless you export to that older version explicitly.
  • You choose which portions of the model are written, so an incomplete selection can leave out loads, groups or output.
  • As ASCII, .neu files are larger than the binary .modfem and slower to read back for very large models.

Frequently asked questions

Is .neu better than .modfem for archiving?
Yes - the ASCII neutral file is platform- and version-portable, which Femap recommends for long-term storage over the binary .modfem.
Can another program read the .neu?
Many FEA tools import the Femap neutral format, so it is a common exchange route out of Femap.
Will an old Femap open a new .neu?
Not directly; export to the target's version number from the neutral dialog first.
Does the .neu keep results?
It can include output blocks if you select them in the export, but confirm the checkboxes since selection controls what is written.