Opcfhdr.ebs needs to be modified for building linenumber (lineno.+size+spec) and to add this linenumber in backing sheet coordinates need to be defined in position (POS) file.
Steps to Accomplish:
Go to following location
C:\Program Files (x86)\Bentley\Plant V8i\XCHG\pcf.
2. Open opcfhdr.ebs file in script editor.
3. Search “Attribute 99”, Refer below image
4. Add below lines highlighted above the line
nStat = at_XchgWritelnText(" ATTRIBUTE99 END")
Dim compID As At_ComponentID
Dim specName As String Dim siza as string
Dim lino as string
nStat = at_Component_getCurrID(compID)
nStat = at_Component_getString (specName, compID, "SPEC")
nStat = at_Component_getString (lino, compID, "LINENUMBER")
nStat = at_Component_getString (siza, compID, "MAIN_SIZE")
nStat = at_XchgWritelnText(" ATTRIBUTE35 "+ lino + "-" + siza + "-" + specname)
Refer below image.
5. Save the file.
6. Open Project administrator for editing position file, add new entry here for linenumber coordinate
-635 50000 1150 100 250 0 0 0 0 0
Refer below image
7. Save position file.
8. Generate isometric to verify the result.