I looked more closely and noticed a couple of different things with the output. In v11.3, I get this:

********* Input Data summary *******

Number of sites = 162

Number of sampling occasions = 4

Number of states = 0

Number of missing observations = 0

Data checksum = 15524

But in v13.12, I get this:

********* Input Data summary *******

Number of sites = 162

Number of sampling occasions = 4

Number of states = 2

Number of missing observations = 0

The number of states have changed, both were ran as simple single season.

Other different output in case that's helpful:

v11.3

Untransformed Estimates of coefficients for covariates (Beta's)

======================================================================

estimate std.error

A1 psi : -0.354876 0.750110

A2 psi.for : 0.957810 0.422500

B1 P[1] : 7.145611 2.476664

B2 P[1].date : -1.091891 0.290107

v13.12

Untransformed Estimates of coefficients for covariates (Beta's)

======================================================================

estimate std.error

A1 psi.a1 : -0.354876 0.000000

A2 psi.for : 0.957810 0.000000

B1 P[4].b1 : 7.145611 0.000000

B2 P[1].date : -1.091891 0.000000

and also this statement that I have not seen in the previous version:

attempt 0/0 (iv= 0.0000 0.0000 0.0000...), -2loglike= 200.4056, optmiz time:0.0 min.

0 random initial value vectors attempted:

Initial values:

0.0000 0.0000 0.0000 0.0000 0.0000

Apologies if this is not a software/glitch issue, but I was wondering if something has changed between the versions where perhaps now I have to change how I enter/run the models, or if there is just some sort of error happening. I tried running other pa3 files from the previous version and I'm getting the same issue. Thanks in advance for any guidance.