MDT drawing export to INVENTOR; fatal error

[Anonymous]

Dear everyone,
In order to show my case exactly I have no way only explain everything by details.
We need to export our Autodesk Mechanical Desktop drawings to Autodesk Inventor. So I read related topics in AUTODESK FORUM and then I installed both of softwares in 64Bit version.
But at the start of the export, fatal error happened and both MDT & Inventor closed suddenly!
I tried many times, even I installed Windows7 64Bit on VIRTUALBox. But same error happens again.
I found out if I install Windows7 32Bit and then I try MDT and INVENTOR 2015 X86 versions; exporting drawings goes on well but for drawings with low number of parts.
The problem is that I have 3.5 GB of Ram on Windows 7SP1. But my inventor uses only 1.5GB (shown on the right bottom of the page of inventor screen).
At the middle of exporting drawings when this memory is full and its color changes to red, the error screen appears.
How can I fix it?
Why my Windows 7 on VirtualBox have 3.5GB of RAM but Inventor is only using less than 1.5 GBs?!

[Anonymous]

Well, let me explain more
When I go to Program Files\Autodesk\Inventor 2015\Bin
and I run memprobe.exe, attached picture appears.
I need to increase Virtual Query of inventor. Because I have more physical and virtual memory available that inventor does not use.

[Frederick_Law]

How big is the MDT file?

You want to import the 3D model from MDT (model space) or the drawing (Paper space)?

Can you open the file with MDT?

You are trying to prove Inventor is not running out of memory but you are running both MDT and Inventor to convert the file.  3.5GB is really pushing the limit.

[Anonymous]

Hi. Thanks for the reply.

MDT file has 250 parts and 2 assemblies. It also has some drawing layouts. 

I know 3.5 GB is not big, But the problem is something else. My Inventor does not use all 3.5 GB and it only uses 1.4 GB.

Please see the new picture. It is after half an hour of converting parts and assemblies; some minutes before the fatal error. You see only 57 MB is free in Virtual Query of Inventor. But in Physical memory 1109 MB is still available.

Why does Inventor not use the whole 3.5GB?

[Frederick_Law]

Inventor cannot allocate more Virtual Query, there is 7MB free.

Inventor committed 1638MB.  Free memory is 1170MB, less then what Inventor need.

You can try increase your pagefile size but I doubt it will help.

Either there is not enough memory or something wrong with the MDT file.

[Anonymous]

I don't think. there is nothing wrong with my MDT *.dwg files. I tried many of them. All models with parts more than 150 have the same issue in the middle of export.

You know, I had no way. I installed a 32Bit Windows 7 on VirtualBox because 64 Bit versions of MDT and Inventor stop work in the first second. At least 32Bit works for models with fewer parts!

Can you help me with 64 Bit version?

[johnsonshiue · Accepted solution]

Hi! It has been a while since I worked on 32-bit system. If I recalled correctly, the restriction is not imposed by application like AutoCAD or Inventor. It is actually a limitation by 32-bit Windows. Here is an old document showing to to enable 3GB memory usage. Please take a look.

https://knowledge.autodesk.com/support/autocad/learn-explore/caas/sfdcarticles/sfdcarticles/How-to-e...

Many thanks!

[Frederick_Law]

I don't have MDT.  IV2017 only convert some MDT version without MDT.

Which version is the MDT file?

[Anonymous]

Thank you man. That worked!  🙂

Many Many Thanks