When a model fails to run, a red error message will be displayed at the bottom of the screen. A list of common error messages and what they mean can be found below.
| Type of Error |
Example of Error Message |
| Invalid R expression used in formula, preventing it from being evaluated. | Error in parameter "p_sick_nat", syntax error in R expression. |
| Formula refers to variable that does not exist, or that was undefined when formula was evaluated. | Error in parameter 'p_sick_new', object "p_death_new" not found |
| One or more variables contain circular references. | Circular reference in parameters: "p_death_new", "p_death_nat" |
| Model exceeds maximum allowed memory storage, preventing it from running. | Apologies, your model exceeded the maximum memory allowed. Please shorten the timeframe or reduce the number of tunnel states in your model |
| Transition probabilities in a Markov model are either < 0 or > 1. |
Some transition probabilities are outside the interval [0 - 1]: cycle: 1, from: well, to: well cycle: 2, from: well, to: well cycle: 3, from: well, to: well ... |
| Transition probabilities in a Markov model in one or more states and/or cycles do not sum to 1. |
Not all transition matrix rows sum to 1.
well 1-20 |
| More than one transition associated with the same 'from' state used keyword 'C'. |
Error in transition matrix, keyword "C" used more than once per state:
state cycles well 1-20 |