bug report from Stanford's CEE 296 class:
When running MDOF-LU and OpenSees response simulation with 1D ground motion input (i.e., the data_y field is removed from the event file), OpenSees returns incorrect EDPs. Looking at the example.tcl file, the error seems to stem from a second timeSeries being assigned to the acceleration recorder even though there is only one timeSeries present in the analysis.
A quick workaround: Use data_y: [0.0, 0.0] in the event file.
UPDATE:
This bug was fixed in rWHALE released as part of v2.3.0 of SimCenterBackendApplications