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The following occurs when trying to run an analysis:
---------------------------Error--------------------------- E801-4: Zero length element---------------------------OK ---------------------------
How to resolve this issue?
The problem is that AutoPIPE is seeing a pipe length = 0.00. Please see the following process to fix:
1. In the Input grid select the points tab:
2. Double click on the column heading "Length".
3. Search for non-grayed out cells, example A01.
4. Place grid back into original order by double clicking the top Left corner cell.
5. Review the issue an determine the best course of action.
In this model only, there is a segment that has Zero Length, best option in this case is that the entire segment be deleted.
Using typically AutoPIPE commands Select the Segment (ex. C) and press Delete button to delete it from the model.
In another scenario the problem may be fixed by 1 of 2 additional methods
1. Removing the offending node point
OR
2. If 2 node points are directly atop one another in 3D space, insert a small distance between the 2 node points to prevent this message from being displayed. (ex. length greater than 0.01").
Note:
A. This scenario occurred after importing a PXF model. Upon closer inspection of the original model in OpenPLANT, it was determined that there was a very small pipe run = 0.026 inches. Sometimes a completely review the original model looking for such modeling errors helps when translating the model to AutoPIPE.
Left Image:below of original model and Right image below of hidden pipe to show segment that is causing the problem in AutoPIPE.
B. Another common location for this error is about a bend. A bend is comprised of 4 node points: 1. Near, 2. Far, 3. Mid, 4. TIP, if an AutoPIPE component is placed directly atop the Bends Near or Far node points this message will appear. Again, best course of action is to move the AutoPIPE component or node point a short distance away from the Bend's Near and Far locations
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