Individual Covariate in Two-species Model

[marina]

I am running the 2 species conditional Occupancy Estimate on Mark with one covariate. My data are arranged as follows (putting only one row of data):

/*E01*/ 101010000000100001000010001000001000010000100000101000 1 8194;

I can run all the models without any problem but I get the following error message when I try to access "Individual Covariate Plot" button:

Problem with the encounter history - Incorrect Length

May be some error in the way I arranged my txt file? If I want to add more covariates How can I proceed?
Thank´s
(sorry for my terrible English)
Marina