Short description:

If a structure is pasted to a cell, which is referred by a JCMarkushMatch function, memory usage of JChem for Excel may increase to an inconvenient level in some environments, which can result in rare cases in the crash of the application.


Background:

The reason for this is that to perform the Markush search the whole Markush library is enumerated in the background, which needs extra memory usage.


What the user experiences:

The user experiences an unusual long time when pasting a structure to an empty cell: after pressing the "Paste" JChem ribbon button or the "Ctrl+V" keyboard button combination, sandglass may appear in Excel and the user needs to wait until the structure is pasted. This happens only if the structure is pasted to a cell, which is referred by a JCMarkushMatch function. 

Time need of the copy-paste process is normal if the structure is pasted to an empty cell, which is not referred by a JCMarkushMatch function.


Suggested steps:

Please wait until the paste process is finished. If crash happens, please don't disable the add-in (see more about this in the following Solution Article:

https://chemaxon.freshdesk.com/a/solutions/articles/43000613915