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', Error: object 'p_death_new' not found |
One or more variables contain circular references. | Circular reference in parameters In call: resolve_dependencies.default(parameters) |
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. | Error in check_matrix(trans_matrix): Some transition probabilities are outside the interval [0 - 1]: cycle: 1, from: well, to: well cycle: 2, from: well, to: well cycle: 3 |
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. state cycles 1 well 1-20 |