HydraCARDs | Error in MiscFunc.exe|PumpCalc|Form_Activate Error 457-This key is already associated with an element of this collection <img src="https://hydracards-storage.s3.amazonaws.com/media/public/django-summernote/2025-10-21/86295f72-8f7c-413c-9b9e-e0b206973834.png" style="width: 458px;"> The error may also be a Runtime Error instead

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AutoCAD Based HydraCALC (Ribbon/Toolbar/Location)

Button: Calculate Error Type: Runtime Error

Description:

Error in MiscFunc.exe|PumpCalc|Form_Activate

Error 457-This key is already associated with an element of this collection

The error may also be a Runtime Error instead

Cause:

Duplicated reference points in the Check Line piping tab

Solution:

You cannot duplicate reference points between the System Piping & Check Line Piping tabs

Updated: Oct. 21, 2025, 5:33 p.m. Created: March 1, 2019, midnight