🐛 Bug Report

Reproduction Steps

1. Draw one or more ROIs in the Slim viewer (each gets a generated roi.uid).
2. Click on Save ROI in SlideViewer which calls handleReportGeneration()
3. Observe console error:

Uncaught Error: Option 'trackingIdentifier' must include a human readable tracking identifier and a tracking unique identifier.

4. console.log(trackingIdentifier) shows an array of three entries:

   [
     { "uid": "…", "identifier": "ROI #1" },        ← raw options object
     { /* TextContentItem for identifier */ },
     { /* UIDRefContentItem for uid */ }
   ]

What’s Happening

As you can see in the above image. In templates.js (in the dcmjs-sr-templates ), at line 904 the length of array TrackingIdentifier is expected to be 2:

if (options.trackingIdentifier.length !== 2) {
            throw new Error(
                "Option 'trackingIdentifier' must include a human readable tracking " +
                    "identifier and a tracking unique identifier."
            );
        }

and the source of error lies in same templates.js (in the dcmjs-sr-templates ), at line 1556

1554   class TrackingIdentifier extends Template {
1555   constructor(options) {
1556   super(options);    // <-- pushes the raw options object into `this`
1557   // …then pushes the two ContentItems…
}

Because Template extends an array, super(options) adds the plain {uid, identifier} object as the first sequence item. Downstream code expects exactly two items (TEXT + UIDREF), so it throws.

Expected Behavior

• TrackingIdentifier should only produce:

  1. A TextContentItem (if options.identifier is provided)
  2. A UIDRefContentItem (for options.uid)

• No extra plain-object entry should appear.

Proposed Fix

In templates.js, change:

- constructor(options) {
-   super(options);
+ constructor(options) {
+   super();

after implementing this change, the issue was resolved.