Can you check 
if its already attached ? it is a best practice to use the IsConnected function in the Reader stage. If it returns True then no need to Attach and if it is False only then Attach it.------------------------------
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Vipul Tiwari
Senior Process Simplification and Optimization Designer(Solutions Architect)
Fidelity International
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Vipul Tiwari
Senior Process Simplification Developer
Amazon
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