Duplicate tags via system.tag.configure generating NullPointerException

Ignition
1

Hello,

I'm trying to simply duplicate a subset of tags. Essentially copy and paste tags into the same folder, appending some chars to the end of the name and tweak the opcItemPath. I have the script mostly working, but I'm hung up on the system.tag.configure line, which is generating a NullPointerException error, even though when I print out the tagconfig in question, everything looks good. Can someone please point out what I'm missing? Code and applicable Tag Config as follows...

Code:

# Parameters
sourceFolderPath = "[Default]1021203109W5XXXX"  # Replace with your source folder path
substring = ".r4."  # Substring to search for in opcItemPath
replacement = ".r1."  # Replacement substring for the new tags

# Initialize a stack to simulate recursion
folders_to_process = [sourceFolderPath]

while folders_to_process:
    # Get the next folder to process
    current_folder = folders_to_process.pop()
    
    try:
        # Browse tags in the current folder
        tags = system.tag.browse(current_folder).getResults()
        
        for tag in tags:
            # Debug: Print the full path of the tag
            print("Found tag/folder:", tag['fullPath'])
            
            if tag['hasChildren']:
                # Add subfolders to the stack only if the tag has children
                folders_to_process.append(tag['fullPath'])
            else:
                # Get the tag configuration for leaf tags
                try:
                    # Correct usage: Pass the fullPath as a string
                    tagConfig = system.tag.getConfiguration(tag['fullPath'], recursive=False)
                except Exception as e:
                    print("Error fetching tag configuration for '{}': {}".format(tag['fullPath'], str(e)))
                    continue
                
                if tagConfig:
                    tagConfig = tagConfig[0]  # Extract the first (and only) tag config
                    
                    # Check if it has an OPC item path with the desired substring
                    if 'opcItemPath' in tagConfig and substring in tagConfig['opcItemPath']:
                        oldOpcPath = tagConfig['opcItemPath']
                        newOpcItemPath = oldOpcPath.replace(substring, replacement)
                        
                        # Modify the tag name for the copied tag
                        newTagName = tagConfig["name"] + "_r4"  # Append "_r4" to the tag name
                        
                        # Modify the tag configuration for copying
                        tagConfig["name"] = newTagName
                        tagConfig["opcItemPath"] = newOpcItemPath
                        
                        # Remove properties that are not valid for new tags
                        #tagConfig.pop("tagType", None)  # Remove 'tagType' if present
                        tagConfig.pop("path", None)    # Remove 'path' if present
                        
                        # Determine the destination folder (same as the original folder)
                        destinationFolder = "/".join(str(tag['fullPath']).split("/")[:-1])
                        print("Destination folder:", destinationFolder)
                        
                        # Paste the tag into the original folder
                        try:
                            # Debug: Print the tag configuration
                            print("Tag configuration being copied:", tagConfig)
                            
                            # Update tag configuration and paste
                            system.tag.configure(destinationFolder, [tagConfig], collisionPolicy = "a")
                            print("Successfully copied tag to:", destinationFolder)
                        except Exception as e:
                            print("Error copying tag to '{}': {}".format(destinationFolder, str(e)))
    except Exception as e:
        print("Error browsing folder '{}': {}".format(current_folder, str(e)))

Tag Config:

('Tag configuration being copied:', {u'tagGroup': u'Field', u'historyEnabled': True, u'historicalDeadband': 0.0, u'dataType': Boolean, u'readOnly': True, u'historyProvider': u'Ignition_Historian_Splitter', u'opcItemPath': u'nsu=urn:WellTrak;s=c113.r1.shutin', u'tagType': AtomicTag, u'name': u'SHUTIN_r4', u'opcServer': u'WellTrak OpcUa', u'valueSource': u'opc', u'historyMaxAge': 12, u'value': False})

2

If you comment that line out, your script works.

3

Oh wow, I thought I had tried that, but obviously I didn't. Thanks for the assistance, that simple edit did the trick.

1 Like