# Troubleshooting semantic models

## Invalid expression in measure or dimension

**Symptom**: A measure or dimension shows a validation error.

**Cause**: The expression contains a syntax error, references a field that does not exist, or uses an unsupported function.

**Resolution**:

* Check the error message for details about the issue.
* Ensure that the referenced fields exist in the tables included in the semantic model.
* Confirm that function names are spelled correctly and use supported Qlik functions.

## Table cannot be added

**Symptom**: A table from a dataset cannot be added to the semantic model.

**Cause**: The dataset may be inaccessible, or you may not have permission to view the dataset.

**Resolution**:

* Verify that the dataset is included in the data product.
* Check that you have access to the data space containing the dataset.
* Contact the dataset owner to request access if needed.

## Changes not reflected in consuming applications

**Symptom**: Applications that consume the semantic model do not show recent changes.

**Cause**:The data product may not have been reloaded. In a published application, inherited master items remain fixed to the version of the data product used when the application was published. Reloading a published application does not create, update, or delete master items from the data product.

**Resolution**:

* For an unpublished application: Make any changes needed, and then reload the application.
* For a published application: Update the application and publish it again to use new or changed measures and dimensions.