Group - group contributions unavailable (Q944)

Summary:

Group – group and group – point contributions are not supported for continuous (non-batch) projects that use lags/dynamic lags in the mode.

Cause:

SIMCA^®-online doesn't include all data needed to be able to compute the values of the lagged variables.

Workaround:

If contributions are very important, SIMCA^® can be used to compute them: Use the Update SIMCA^® project functionality in SIMCA^®-online to add the relevant process data to the project file. Then you can predict this data in SIMCA^® (offline) with the original model, and finally create the contribution plot in SIMCA^®.

Note that you can still create contributions to average in SIMCA^®-online by selecting a single contiguous block of observations (no gaps in time). And you can still select two blocks of observations and create a contribution plot when the first block is more recent than the second block, and the blocks are contiguous (and next to each other).

More Information:
Internal Sartorius bug number: 21001.

Status:
This problem is fixed in SIMCA-online 16.1.2.