Why do I get "Array indices must be positive integers or logical values" error when reading an image?

I keep getting this error but I don't know why. I just needed to upload an image on the script.

Answer 1

[Jan]

Did you define "imshow" as a variable?

whos imshow
which imshow -all

To clear it:

clear imshow

But it is strange, that the error message mentions imshow in line 109, while the displayed command is in line 111.

Please care for posting the code and the message exactly how they are existing.