MDS XLS add-in loses its relation with mds, active sheet does not contain MDS data

<p>I am a happy user of the MDS XLS add-in as it is a practical alternative for bulk manipulations. Sometimes though the sheet loses its relation to the entity and is not able te reconnect. The scenario is the following.</p><p>a new spreadsheet is opened anc connects to an existing entity which is loaded. A few colums further data of another source is loaded. Stepwise the existing MDS meber are updated or new members are added based on the external source data. Batches of updates are published. Once in a while I can no longer update or add members (even after reconnecting or saving the xls and reopening it again). If&nbsp;we publish again we get the message "the active sheet does not contain MDS data". If I select a new sheet within the same xls, I can reload the members and copy the other section with the external data and continue the work. Has anybody an idea why a sheet suddenly loses its ability to connect to MDS?</p><p>thanks for your suggestions,</p><p>Peter Jonckheere</p>