Troubleshooting Heat Exchanger Error Msg

[yecko]

Homework Statement

Crude Oil Preheat Chain

Relevant Equations

SPRINT (software) used

How should I do to eliminate the error message?
In what direction should I approach the question? (I have tried difference combination and sequences of the heat exchanger below pinch, all seems not working)
Thanks

 

[anorlunda]

That screen shot you posted is too low resolution to read any of the text. I can't see what software you are running or what the error warnings say.

Can you post that information in text rather than a screen shot?

 

[yecko]

It is hard to type the diagram here, let me post the pic again in Imgur, the link:




Thank you

 

[yecko]

this is also what I got with dTT and dH fulfill the requirement, yet with the same error message