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** Fatal ** CurveValue: Invalid curve passed.

asked 2016-06-20 14:44:07 -0500

I ran my model in EnergyPlus and I am getting this error on one of my files, it uses a single speed DX cooling coil and a single speed DX heating coil. I have used both these objects and the curves that go with them before but not got this error. Does anyone know where I should be looking or what this really means. I have copied the curves from the examples files and pasted them in.

I appeciate anyone who can help me solve this mystery

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Here's the line on which the Fatal error is thrown:

Julien Marrec's avatar Julien Marrec  ( 2016-06-20 14:58:40 -0500 )edit

Are you sure that your curves are actually in the file? If you forgot one it could CurveIndex < 0. Check the IDF editor for missing objects

Julien Marrec's avatar Julien Marrec  ( 2016-06-20 14:59:53 -0500 )edit

I thought I was sure but it looks like maybe I am missing one. I will take another look.

Annie Marston's avatar Annie Marston  ( 2016-06-20 15:09:46 -0500 )edit

2 Answers

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answered 2016-06-20 15:05:29 -0500

I just fixed a problem with the missing defrost EIR curve for reverse cycle HP defrost. Is that curve present?

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thanks, I am going to take a look now.

Annie Marston's avatar Annie Marston  ( 2016-06-20 15:10:00 -0500 )edit

If I may suggest, it might be worth it to see if there isn't a quick way to output a more informative message, like which curve appears to be missing.

Julien Marrec's avatar Julien Marrec  ( 2016-06-20 15:45:23 -0500 )edit

I completely agree with this, although most E+ Warning messages are excellent, there are few more cryptic ones that could do with a clearer explanation.

Annie Marston's avatar Annie Marston  ( 2016-06-20 16:05:51 -0500 )edit

Part of the previous problem was that the warning message was only issued if the DX heating coil defrost strategy was Reverse Cycle AND the defrost control was On Demand. This has been changed to always issue a warning when Reverse Cycle is used without a defrost EIR curve. It would also be nice to have some defrost data so we could come up with a default defrost EIR curve...eventually.

rraustad's avatar rraustad  ( 2016-06-21 08:23:11 -0500 )edit

answered 2016-06-20 15:16:31 -0500

I don't know what I would do without you all! So it was an issue in the Coil:Heating:DX:SingleSpeed object. I had the Defrost strategy on as well as a few other extra bits at the bottom there. I removed them and voila! idf is running. Thank you both again, you are the best.

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Asked: 2016-06-20 14:44:07 -0500

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Last updated: Jun 20 '16