VPL doesn't open back up

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Summary:

My students will create a program in VPL, they will unplug or turn off the robot.

VPL doesn't open back up

sharon13m 19 Nov 2012 22:57

My students will create a program in VPL, they will unplug or turn off the robot, and then VPL will not open again. Their code remains and it is unchanged, but they are unable to edit their work in VPL. This is pretty much the equivalent of not being able to save their work since they do not know how to write code yet. Any help on this issue would be appreciated.

Re: VPL doesn't open back up

riedo 20 Nov 2012 07:40

Hello,

Can you give more details? which version of aseba studio are you using, on which platform? When you unplug the robot and replug it, can you edit the text or is studio frozen? it's the VPL window that doesn't open again? can you save the file?

Re: VPL doesn't open back up

eziosoma 20 Nov 2012 19:00

If this can help I've noticed that if you create a program with the VPL and save it from VPL you are still able to reopen it from VPL.
If you look at the text code from Aseba Studio text editor and you save again the file without changing nothing, you will no more able to open this file from the VPL.
Having a look to the file and doing a confrontation with a backup copy still working under VPL, I've seen that the file saved from Aseba studio lacks of this part:

<vpl-setting>
<mode advanced="false"/>
<colorscheme value="0"/>
</vpl-setting>

<vpl-button-element>
<event button0="0" button1="0" button2="0" button3="0" button4="1" name="button" state="-1"/>
<action button0="2" button1="0" button2="2" button3="0" button4="2" button5="0" name="circle" button6="2" button7="0"/>
</vpl-button-element>

<vpl-button-element>
<event button0="1" button1="0" button2="0" button3="0" button4="0" name="button" state="-1"/>
<action button0="0" button1="2" button2="0" button3="2" button4="0" button5="2" name="circle" button6="0" button7="2"/>
</vpl-button-element>

I've also seen that if I put this peace of code back in the file saved with Aseba studio, just before the last tag

</network>

I'm again able to open the file from the VPL.

The version of Aseba studio that I use is 1.2.0.

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Sic Parvis Magna

Last edited on 23 Feb 2013 05:29 by eziosoma Show more

Re: VPL doesn't open back up

riedo 20 Nov 2012 21:03

Yes, this is normal.
A VPL file is like another aesl text file with a part added for VPL code (the piece of code you posted)
If you work from VPL you should save from VPL; it will save the cards information + the text code that VPL created from the cards.
If you close VPL and save from the text interface, Studio assumes you worked in text mode, and saves only this code, because the text based language cannot be translated back to VPL.
People who start in VPL, and then want to make the program more complex by directly using the aseba language, might do this. Once they do this, the code does not correspond to the cards anymore; they cannot go back to VPL, but they can work from the same file where they started.
Those who don't intend to work from the text interface but only in VPL, should stay in VPL and save from there.