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Hello, I am trying to use the MC2pack to sample from a univariate density, using MH or GG. As a preliminary exercise, I adjusted the mcstack_clean.ox code to keep only one parameter as an unknown (the beta coefficient on Air Flow), but I get error messages when I run it. I am attaching the modified file. The error messages are below: Columns don't match: file: 6, matrix: 1 Runtime error occurred in SaveTheta(82), call trace: C:\Program Files\OxMetrics5\Ox\packages/mc2pack/mcmc_addit.ox (82): SaveTheta C:\Program Files\OxMetrics5\Ox\packages/mc2pack/mcmc_addit.ox (48): AddTheta C:\Program Files\OxMetrics5\Ox\packages/mc2pack/mcmc_mh.ox (89): Sample_MH C:\Program Files\OxMetrics5\Ox\packages/mc2pack/mc2pack.ox (988): Simulate C:\Program Files\OxMetrics5\Ox\packages\mc2pack\samples/mcstack_cleanOneCoef.ox (137): main Is there something I need to fix in the main files (mc2pack, etc.) when I am drawing from a univariate density? Thank you very much! Best, Zhanar.