MATLAB was something wrong when i used the function SerialLink.teach.

[ech...@gmail.com]

MATLAB was something wrong when i used the function SerialLink.teach. Initially I used the Matlab2012 and my file could be run successfully. However, the next time I run the same file, Matlab was closed unexpectly. When I delete the function, the file can run successfully again. Firstly, I guess this bug might be cause by the vision of my Matlab.  I  tried to change the vision to Matlab 2014 but it still doesn't work. I can't use SerialLink.teach and I'm quite worry about it. Looking forward to your reply.

[Peter Corke]

Send more details so somebody else can reproduce the problem.

peter

On 29 Mar 2015, at 11:58 pm, ech...@gmail.com wrote:

MATLAB was something wrong when i used the function SerialLink.teach. Initially I used the Matlab2012 and my file could be run successfully. However, the next time I run the same file, Matlab was closed unexpectly. When I delete the function, the file can run successfully again. Firstly, I guess this bug might be cause by the vision of my Matlab.  I  tried to change the vision to Matlab 2014 but it still doesn't work. I can't use SerialLink.teach and I'm quite worry about it. Looking forward to your reply.

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[Erik van Oene]

Hi,

I have seen this error several times also...
My guess is that is has something to do with the memory usage of the teach command in matlab. I also encountered this error using the animate command in a for loop.

Example:
>> mdl_puma560
>> p560.teach

works fine and is only using 512 MB of RAM of my compute,r which is mainly matlab itself as this is about 500MB after a fresh startup.
However the following commands use 2448 MB of RAM meaning nearly 2GB is used by the teach command for this particular model (the phantomx).

>> mdl_phantomx
>> px.teach

On my laptop this produces a crash, though my workstation is able to handle this teach command without a crash, though it takes quite long to pop-up the window. See the attachments of profile reports on both runs.

I guess there is some memory leakage due to some property in the seriallink object.
My suggestion is: Try to do the same with the puma560 model and see if this produces the crash or not and check the memory usage. After that do the same with the phantomx and post your findings here.

Erik


Op maandag 30 maart 2015 12:09:06 UTC+2 schreef Peter Corke:

[Peter.I.corke]

Turn off the floor tiles for this model!

The default tile size is 0.1 but this model uses units of mm so the floor dimension is large and there are a squillion tiles

Peter.

Sent from my iPhone

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<puma560_teach.JPG>

[Erik van Oene]

Thanks Peter,

This perfectly solved my problem. I never looked deep into this phenomena as it was no big deal for me at the moment, but this is indeed cause the memory raise. 

Why didn't I see this myself, the answer was literally on the floor in front of me!!

Hopefully this solves the error of questioner also. Please let us know.

Erik

Op woensdag 1 april 2015 21:52:00 UTC+2 schreef Peter Corke:

[vpr...@gmail.com]

Hello Peter,

Iam experiencing a similar issue now, as the one mentioned in this post. The command p1.teach command worked well the first time i executed it... but when i ran it the next time, it began givin me errors. i.e the matlab got closed. Can you please help me resolve it?. i've attached the snap for your reference

Thanks

Praveen

[fatem...@gmail.com]

when i use teach() , my matlab began giving me this error :Matlab has encounted an internal problem and needs to close , how can i solve it ? and how can i turn off the floor tiles?

[Peter Corke]

plot the robot first using the 'notiles' option

then invoke teach() on that same robot object, it will build a teach interface in that plot without tiles