NullReferanceException was unhandled

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   I've been working away programming and debugging as I go. Everything working as expected. I'm using a Dataset. I find I don't need 2 of the original column names so I delete 1 and change the name of the other. I try to run the code again and I get the error "NullReferanceException was unhandled" at QP.LoadFromFile(MyPDF, ""). MyPDF does contain the path string. 

So, I change the column name back to original and add another column using original name and it works.  I add a new column and it works. I change new column name and it continues to work.

I don't understand why/how QP can know or even care columns are changed.

Ideas?

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don6558 Members Profile Find Members Posts Beginner Joined: 20 Feb 14 Status: Offline Points: 5	Post Options Post Reply Quote don6558 Report Post Thanks(0) Quote Reply Topic: NullReferanceException was unhandled Posted: 04 Apr 14 at 7:36AM
	I've been working away programming and debugging as I go. Everything working as expected. I'm using a Dataset. I find I don't need 2 of the original column names so I delete 1 and change the name of the other. I try to run the code again and I get the error "NullReferanceException was unhandled" at QP.LoadFromFile(MyPDF, ""). MyPDF does contain the path string. So, I change the column name back to original and add another column using original name and it works. I add a new column and it works. I change new column name and it continues to work. I don't understand why/how QP can know or even care columns are changed. Ideas?

don6558 Members Profile Find Members Posts Beginner Joined: 20 Feb 14 Status: Offline Points: 5	Post Options Post Reply Quote don6558 Report Post Thanks(0) Quote Reply Posted: 04 Apr 14 at 7:39AM
	Oops! It is probably important to let you know I'm programming in 2010 vb.net;-)