Could not save Spotfire analysis.

Problem.

Error message: Could not publish <dashboard or report>.

SerializationException at Spotfire.Dxp.Framework:
Attempt to read from a node that is in state 'Disposed': Spotfire.Dxp.Framework.DocumentModel.State.DisposedUndoablePropertyNodeState`1[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].

Solutions.

To resolve this issue, below are few possible workarounds to follow:

Option A:-  Deploy the missing extensions, this should remedy the situation.

The report could have been originally created with a Spotfire extension installed, that is no longer installed.  This can happen when changing deployment areas, or after a software upgrade that had to remove old and no longer supported Spotfire extensions.

Option B:-
1) Create a text area > Add a script control with the following script

from System.Reflection import BindingFlags
nodes = Document.CustomNodes
type = nodes.GetType()
removeMethod = type.GetMethod("RemoveStandIns", BindingFlags.NonPublic | BindingFlags.Instance);
removeMethod.Invoke(nodes, None)

2) Run the script
3) Remove the text area and delete the pages
4) Save the file

Option C:-  Create a clean analysis, move content from the old analysis to the new (drag'n'drop pages)

This box will be hidden from the public.
From Case: #219072