I'm trying to change which parameter to estimate by subtraction in a multistate model. This facility is very helpful, particularly as it allows you to build useful additive models. However, in my version of MARK (4.3) it doesn't quite seem to work. I can change the probability to obtain by subtraction in the dialog box, but MARK seems to take no notice of this when I run the model. In fact, if I immediately reopen the dialog box, the default values are shown rather than what I just chose. What's going on - is it a bug?
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