What is the NXT Animation Process ?

[David Austin]

I keep getting an "Unhandled" error message when I try to create an animation via Nxt Walk through. Is it necessary to use Co-Motion to create animation in Nxt ?

[Ros. Riha]

have you got enough RAM?

[David Austin]

I've got 2 gig of RAM

[Ros. Riha]

then I would expect it might be the problem - 2GB is usually not enough...

[David Austin]

What would be a "good" amount of RAM? I just re-booted and the animation started okay...
We'll see if it works now.
Thanks

Dave

[Roy Hirshkowitz]

Nothing to do with how much RAM you have.  If this is a 32bit system you may be exceeding address space limitations if the model is large-- again nothing to do with physical RAM.

[Ros. Riha]

I do not quite understand - so foth it seemed RAM does matter... even the use of /3GB switch did help us on 32bit systems to prevent some of such crashes.

 

btw: 2GB is IMHO enough to turn the computer on, not enough for CAD

[Chas / Aug Posekany]

The 3GB switch increases allowable paging file space to 3 GB. This does not have anything to do with ram.

32 but systems have a limitation on paging file space at 2GB. The 3GB switch forces a 32 bit system to recognise 3GB of paging file space.

If you multitask or have been running for quite some time without rebooting you slowly consume the 3GB paging file and causes a crash or lock up when you try to do an operation that runs over that 3GB alottment. Sometimes rebooting clears enough space to perform intensive operations sometimes it is just not possible.

It is the paging file limitation, not toal ram that is the culprit.

Upgrading to a 64 bit system cures the paging file issue.

[David Austin]

I'm switching to a 64 bit system. In the mean time I'm still trying to get stuff done. I keep looking for basic information re: the Nxt Walk-Through vs,
CoMotion-2 for Nxt..........when to use which one pros-cons.
Appreciate any suggestions.

[Roy Hirshkowitz]

Use one of the nXt animation choices.  Do not use CoMotion.

[Roy Hirshkowitz]

The amount of physical RAM can impact performance.  It has nothing to do with crashing due to running out of address space.  For example, a 64 bit system with even 1GB of physical RAM would not crash in this way.

 

Chas is almost correct-- but it's not usually a paging file limitation either.  You could increase your paging file to 100GB and it wouldn't make a difference.  (You could cause a crash if you reduced your paging file enough.)

 

This stuff is just a simple physical fact of the 32 bit world.  64 bit machines will "cure" this problem, the 3GB switch may help it to not occur so frequently.

 

*********

 

In case you're wondering-- David's problem could be something completely different than an address space crash.  I'm just guessing that it's the 32 bit thing.