bailout -1
bailout -1
(OP)
(Using nx nastran on siemens NX 7.5)
Sometimes when I'm performing a simulation on a file, when the calculation is complete it gives me the error 'no results are found'. In 99% of the cases, changing the parameter bailout to '-1' will fix the problem and the result will show me what I did wrong (usually, there are too many degrees of freedom because a part is not connected properly or things like that)
My question is: What exactly is the difference between calculating with bailout 0 and bailout -1? What exactly is being calculated when bailout is on 0 and it won't give me any results?
This question probably comes from lack of knowledge of the subject but I'm hoping someone here can explain this to me.
Thanks in advance.
Sometimes when I'm performing a simulation on a file, when the calculation is complete it gives me the error 'no results are found'. In 99% of the cases, changing the parameter bailout to '-1' will fix the problem and the result will show me what I did wrong (usually, there are too many degrees of freedom because a part is not connected properly or things like that)
My question is: What exactly is the difference between calculating with bailout 0 and bailout -1? What exactly is being calculated when bailout is on 0 and it won't give me any results?
This question probably comes from lack of knowledge of the subject but I'm hoping someone here can explain this to me.
Thanks in advance.
NX 7.5.5.4 with Teamcenter 8 on win7 64
Intel Xeon @3.2GHz
8GB RAM
Nvidia Quadro 2000





RE: bailout -1
"On the human scale, the laws of Newtonian Physics are non-negotiable"
RE: bailout -1
NX 7.5.5.4 with Teamcenter 8 on win7 64
Intel Xeon @3.2GHz
8GB RAM
Nvidia Quadro 2000
RE: bailout -1
I don't think so. I think the intent is that this should not be something to ignore and you must consciously override it. If they made it too easy to continue, then users might take that path rather than fixing (or thinking about) their models.
Companies probably wouldn't want their users to have this option either, as it would encourage bad practice. The deck should also be something that anyone can run and get the same answer (on the same version), without intervention after the run starts. This way, if you share the deck, the person on the other end would get the same result and know what adjustments you may have made.
Brian
www.espcomposites.com
RE: bailout -1
I don't see a difference between:
1)making calculation
2)results not found
3)manually setting bailout to -1
4)again make calculation
5)get result to see what's wrong
and:
1)make calculation
2)pivot error: do you want to continue(+whatever warning message you find necessary)?
3)yes: parameter bailout gets set to -1
4)calculation continues
5)get result to see what's wrong
The only difference is that the first way costs more time.
NX 7.5.5.4 with Teamcenter 8 on win7 64
Intel Xeon @3.2GHz
8GB RAM
Nvidia Quadro 2000
RE: bailout -1
"On the human scale, the laws of Newtonian Physics are non-negotiable"
RE: bailout -1
"On the human scale, the laws of Newtonian Physics are non-negotiable"
RE: bailout -1
The calculation starts with a "solution information" tab giving some random numbers of which I have no idea what they mean.
Then after a few seconds/minutes (depending on the size of the calculation) a new tab opens (sparse Matrix Solver) showing a graph describing the amount of equaltions completed with "supernode" (again, no idea what those are) on the X-axis.
NX 7.5.5.4 with Teamcenter 8 on win7 64
Intel Xeon @3.2GHz
8GB RAM
Nvidia Quadro 2000
RE: bailout -1
Not exactly, the nx nastran solver stop when realized that the matrix is singular, the moment depends of the model size, if contact are present or not, etc..
I have reported to SIEMENS guys that I don't like the way that NX Advanced Simulation manages the nx nastran solver error, I have suggested many times to pop-up in the screen that an error exist, this is the way that runs FEMAP pre/post-processor when any solver error exist, the user receives in the screen a window where he/she can revise the F06 file for error explanation or close the window.
Well, let's hope in the future this changes, because novice users are really frustrated when no results exist, and not any error appear in the screen ... well, patience!!.
Best regatds,
Blas.
~~~~~~~~~~~~~~~~~~~~~~
Blas Molero Hidalgo
Ingeniero Industrial
Director
IBERISA
48011 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog de FEMAP & NX Nastran: http://iberisa.wordpress.com/
RE: bailout -1
I'm glad to know there are people thinking the same way I do.
NX 7.5.5.4 with Teamcenter 8 on win7 64
Intel Xeon @3.2GHz
8GB RAM
Nvidia Quadro 2000