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sapnco 3.0 with .net framework 4.0 web application problem


I have a problem.

I connect to rfc function with sapnco 3.0 in my web application.

First, my code is works fine.

But second time i have this error.

System.ArgumentNullException:Value cannot be null.Parameter name : key at System.Collections.Generic.Dictionary'2.

Find Entry(Tkey key) at System.Collections.Generic.Dictionary'2 TryGetValue(Tkey key,Tvalue& value) at SAPMiddleware.Connector.RfcRepositoryManager.GetRepository

(Rfcdestination destination ) at SAPMiddleware.Connector.RfcDestination.get_Repository() at WebApplication......

Error pointed out by the line below.

Untitledd.png (12182 B)
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