java.lang.NullPointerException

[Thomas GUILBERT]

Dear All,

I'm used to built macros for my biologists friends, and randomly this kind of message appears :

java.lang.NullPointerException
at ij.gui.Roi.....
(see attachement)

Could somebody please explain me the reason ? I just don't get it.

Thank you,
TG.

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[dscho]

Hi Thomas,

On Thu, 28 Feb 2013, Thomas GUILBERT wrote:

> I'm used to built macros for my biologists friends, and randomly this kind of message appears :
>
> java.lang.NullPointerException
> at ij.gui.Roi.....
> (see attachement)

I wonder why it was easier for you to send a screenshot instead of simply
Edit>Select All, Edit>Copy and paste. It certainly would have simplified
things on my side.

> Could somebody please explain me the reason ? I just don't get it.

Apparently, you try to select a ROI in the RoiManager that does not
exist...

Ciao,
Johannes

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