Problem:

The following message dialog appears when trying to view a Stress iso drawing in OPIM.

Export to ISM
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The argument "EndNominalDiameter" is not valid, must be
non-negative

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Ok
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Why doe this occur and how to avoid it?

Solution:

This message was displayed when trying to export a model from AutoPIPE to SACS. There are 2 known issue to cause this to happen:

Known issue #1:

Reducer may not have been correctly modeled.

Avoidance:

- - Select and delete all the reducers in the model
  - Reinsert reducer in the model
  - Export the model

Known issues #2:

A support located at a valve's center/midpoint node point.

Avoidance:

1. Relocate the support to one of the valve's end node point

2. Use AutoPIPE 2024 or higher when exporting a model to SACS.