| A function has an incorrect number of arguments. | You used too many or too few parameters to call a function. How do I fix it? Check the chapter on Functions in our documentation and use the correct number of arguments in your formula. |
| Aggregation set to None. | You use an aggregated variable in your formula, but the variable's dimension aggregation is set to None. How do I fix it? Change the variable's dimension aggregation or do not aggregate the variable in your formula. |
| Dimension error. | There is some inconsistency in the variable's dimensions. |
| Data error. | The data dimensionality does not match the variable dimensionality. This can happen if you explicitly apply a dimension and connect the variable to a data item that is not broken down by that dimension. How do I fix it? Make sure the data item and the variable have the same dimension. Either add the dimension to your data source, or remove the dimension from the variable. |
| It is not possible to use date functions for time aggregations. | Currently, calling date to map monthly, quarterly, annual, or exhaustive timespans to an exact date is undefined behaviour. |
| Variable was expected. | You did not provide a variable when you called a function that only works with variables, e.g. is_data. How do I fix it? Use a variable as the argument when calling the function. |
| Invalid number error. | Your formula results in an invalid number (e.g. division by zero, sqrt(-2)). How do I fix it? Correct the formula, or use the if_error function to return an alternative value (e.g. ”Z”) instead of an error. |
| Invalid syntax in formula. | You did not use the correct syntax in your formula, e.g. you forgot the "else" in an if-statement. How do I fix it? Check the function documentation in the help menu or on the functions page here. |
| Mappings to a dimension are ambiguous. | There is more than one path from one dimension to another dimension. E.g. Dimension A → Dimension B → Dimension C and Dimension A → Dimension D → Dimension C. How do I fix it? Remove one of the dimension mappings in the data table. |
| The linked variable does not exist. | This can happen if you import a variable from a linked model, and then delete the original variable in the linked model. How do I fix it? Create and import the variable again. |
| There is a cyclical dependency in this formula. | Your variables cyclically depend on each other, e.g. A depends on B and B depends on A. How do I fix it? Change the referenced timesteps of the variables. E.g. if A depends on B, then B can depend on the previous value of A. |
| Unknown expression. | You tried to use a function that does not exist in xP&A. How do I fix it? Check out the Functions chapter to see the list of supported functions. |
| Unknown variable. | Your formula uses a variable that does not exist in the model. How do I fix it? Import the missing variable from a different model or use a different variable in your formula. |
| You need to aggregate a span using min(), avg(), ... | A span is an array of values, e.g. Variable[all] or Variable[0:t]. The result of your formula has to be a single number and cannot be a span. How do I fix it? Aggregate the span into a single number using an aggregation function like sum(Variable[all]) or min(Variable[0:t]). |
