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The following message appears when importing an file into AutoPIPE:
---------------------------Error--------------------------- Closed loop detected in imported model at TEE point 7. Please correct it in the original source file and import again. ---------------------------OK ---------------------------
As mentioned in the error message the program detected a closed loop in the imported file. AutoPIPE does not allow a segment to be connected back onto itself or contain a "closed loop". There 2 options to fix this issue:
Open the file in the original program and make so the same piping segment / line number does not connect back onto itself at any point. Save the new file, export the newly created file and import it into AutoPIPE.
Using any one of the AutoPIPE translators would have translated the file into an *.NTL file. AutoPIPE then imports the converted NTL file into the program. This NTL file is very restricted in format, but is easy to open, modify, and save using the following procedure:
A. After using the translator, locate the *.NTL file in the same folder as the original imported file.
B. Open the file with any text editing software (i.e. Notepad ++, MS Word, Ultra Edit, etc..) note, use an application that indicates the current location of the cursor (i.e. row and column).
C. Start AutoPIPE and select Help > Contents> Contents Tab> Bentley AutoPIPE> Batch NTL input Reference> Command Card Reference> this will show all the components in great detail that make up the NTL file.
D. Located the offending node point mentioned in the Error message above (ex. point 7).
With the AutoPIPE help information, try to understand what is the text is telling the program to do.
In this case above:
Line 50: Point 6 is a bend with DX, Dy, Dz offset from previous point Run 5 to current node point 6,
Line 51: According to the UUID card, this is just GUID value for the component at node point 6
Line 52: See PIPE card (image below), According to the PIPE card, column 6 is the start of new PIPE ID (ex. PIPE4).
Line 53: RUN card with DX, Dy, Dz offset from previous point BEND 6 to current node point 6F,
Line 54: RUN card with DX, Dy, Dz offset from previous point Run 6F to current node 7,
Line 55: Again according to the UUID card, this is just GUID value for the component Run 7
Line 56: Run 7 with with DX, Dy, Dz offset from previous point Run 7 to current node 7,
Ah ha!!! how can that be, here is where the system is trying to connect back onto itself, and hence the Error message is displayed when importing this NTL file.
Workaround: Delete the offending line from the file (ex. delete line #56 from the file and save the file. Start AutoPIPE, select File> Open> *.NTL, locate the fixed NTL file and try to import it again. Success!!
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