This may be a variation of a case I had.
Nastran uses a "continuation" character in column 73 of the nastran file (.nas) to indicate that the data in the row continues on the next line. In my situation, the row of data was so long that the continuation character was "moved" to a different column, and that threw everything off. (The row as too long because the node numbers were above 100000 and incorrect formatting of the row.)
With over 1 million nodes in your model, some node numbers require 7 characters, so something similar may be happening. If you have a powerful text editor that can handle 42 million lines of text, you can edit the .nas file and search for the text given in error message. (You may be able to use Notepad, but it will take a long time to load that many lines.) If you can confirm that spacing of the entries is the problem, you may be able to correct it manually and run the analysis. The general format is:
- The command is in the first 8 characters of the first row of data.
- The data is in groups of 8 "fields" with 8 characters each, or 4 "fields" with 16 characters each. It is 4 fields/16 characters if the command ends with a *.
- Column 73 gives the continuation symbol which then appears in the first column on the next row.
Instead of doing all of that, maybe you can reduce the number of nodes by meshing some of the parts as linear elements instead of meshing the entire model as parabolic? You can choose which parts use linear and parabolic mesh from the "Mesh > Table" command.
John Holtz, P.E. Global Product Support
Autodesk, Inc. If not provided, indicate the version of Inventor Nastran you are using.If the issue is related to a model, attach the model! See What files to provide when the model is needed.
