Dear experts,
a two-state DCM model with 7 regions (and all connections specified as modulated by one condition as i wanted to use it as a "full model" for post hoc model search) cannot be estimated with SPM12 (error message: Warning: Convergence failure - invoking keyboard.
> In spm_nlsi_GN at 371
In spm_dcm_estimate at 230
In spm_dcm_ui at 144
In spm_nlsi_GN at 372)
the same model with 6 regions nevertheless is estimatable and also with 7 regions as a one-state model?
Can one more region explain this problem and is there anything i can do?
regards
martin
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