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I am trying to test a couple of models and I'm having a problem with the read.capthist() command.

When I use read.capthist() with a capture file that has two sessions (Adults and Pups) I have no problem.

Adults.And.Pups.2014 <- read.capthist("Capture_File_Adults_And_Pups_2014.txt", "Detection_File_No_Extra_Traps.txt", detector = "multi", fmt="trapID", noccasions = c(6,6))

But when I separate the Adults and Pups into separate files, and therefore only a single session,

Adults.2014 <- read.capthist("Capture_File_Adults_2014.txt", "Detection_File_No_Extra_Traps.txt",
detector = "multi", fmt="trapID", nooccasions = 6)

I get the following error message.

Error in rep(NA, nfield - nvar) : invalid 'times' argument

Anyone have any suggestions?

Thanks

You could try spelling 'noccasions' correctly...

Actually I just spelled it wrong on the post, I've got it correct in my code, but still the same error message.

Adults.2014 <- read.capthist("Capture_File_Adults_2014.txt", "Detection_File_No_Extra_Traps.txt",
detector = "multi", fmt="trapID", noccasions=6)

Any other ideas?

I expect there's a problem in your file. You don't need to input the sessions separately. Use subset (?subset.capthist) or split (?split.capthist) to separate sessions.
Murray

I get the same error message "Error in rep(NA, nfield - nvar) : invalid 'times' argument". I understand the error is probably in the data files and I reviewed them without being able to find any errors. Any further suggestion? Thank you very much in advance

If you can't find the problem by viewing the text file it may help to (try to) read it into R as a dataframe with read.table().
Murray

Thank you for your help! At the end it worked with a .csv file saved directly from Excel.