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AutoCAD Based Calculations (Ribbon/Toolbar/Location)
Description:
When running AutoCALC, the process stops around step 2.4c and you get a Run-time error 457, "This key is already associated with an element of this collection
Likely caused by two factors.
1. Two armovers (green pipe) are coming off a branchline (yellow pipe)
2. The 'Set up Drops as Equivalent K-Factors' option is turned on
1. Changing the two green pipes to yellow pipes will allow the calc to run through
2. Uncheck the option for 'Setup Drops as Equivalent K-Factors'