INSUFFICIENT NUMBER OF GRID POINTS SPECIFIED ON ENTRY Error

[Max.H.Pour]

Hi,

I am working on a project and need to analyse a steel structure model to see it can withstand a nominal proof load. no matter what technique I use, I still get the same error which is "INSUFFICIENT NUMBER OF GRID POINTS SPECIFIED ON ENTRY". 

1)I tried to upload the original model directly into In-CAD so as usual In-CAD would recognise the beam elements and analyse it. 

2)then tried to use "Structural members" function to change the beam elements to solid hoping I can resolve the issue, impossible. I get the "INSUFFICIENT NUMBER OF GRID POINTS SPECIFIED ON ENTRY" ERROR.

3)I even converted the model to STEP file, then uploaded into In-CAD, the issue is still there and I get "INSUFFICIENT NUMBER OF GRID POINTS SPECIFIED ON ENTRY" ERROR.

Any Ideas?

thanks,

[shigeaki.k · Accepted solution]

Hello @Max.H.Pour,

could you try either of the following.

"Exclude from analysis" parts except for a few starting with the base and run a simple analysis. Add a part and rerun the analysis. Don't forget to mesh before doing so. Repeat the process until the contact with the issue is found. Redefine the contact definition in question.

Alternatively, go to the Nastran output and

• Update/produce the nastran file if necessary [(1) in the figure below]
• Search for BSCONP command using the search function [(2) in the figure below] or alternatively look for the line starting with BSCONP by manual scroll [(3) in the figure below]
• Find the line that matches the line given by the error
• Look at the "Description" in comment above the BSCONP line. That is the name of the contact definition.
• Return to the Natran model tree and and redefine the contact in question.
• The BSCONP line should be in order of the contact definition e.g. 3rd BSCONP line should be the 3rd contact definition in the Nastran model tree.
• Redefined that contact

Regards,

Shigeaki K.

[Anonymous]

Dear Sir,

And what should I do next after redefining type of surface contact ? How to get to the result from that point ? Because when I press Save or Update Nastran File or Run Analysis again it starts counting one more time with the same problem. I'm looking forward for response from you.

[John_Holtz]

Hi @Anonymous . Welcome to Inventor Nastran.

You should do the following:

1. Create a new post because
   1. This thread has an accepted solution, so some readers may skip over it.
   2. Unless your model is exactly the same as the original model, the problem and solution could be different.
2. The way that you created contact is probably wrong. Did you select the correct faces? (Only the faces that are touching each other should be selected.
3. If you cannot find the solution, then you need to provide your model so that someone can look at it. We cannot guess what the problem is based on a generic error message!
   1. Zip all of the part files (.ipt) and assembly files (.iam).
   2. Create a new post and describe the problem and what you have tried.
   3. Attach the files to your new post.

[Anonymous]

I saw this message because of this gaps in the picture below. I didn't get this error message when I analyzed after filling this gap