Troubleshooting: The Project Could Not Be Calculated

This message is usually the final wrapper around a backend calculation or persistence failure. The visible text is often simpler than the real reason.

What it means

Either the submitted scenario data was incomplete or inconsistent in a way that survived UI entry, or the backend hit a deeper problem while trying to calculate and store results.

Common causes

Typical causes include scenario fields that were saved incompletely, conflicting assumption/profile selections, hidden field values that no longer match allowed backend values, or rare persistence problems when saving results.

How to narrow it down

Start by checking whether the scenario itself can still be updated successfully. Then review the exact scenario fields that were changed most recently, especially around solar, installation, and profile-driven dropdowns. If a version used to calculate and now fails only after one change, that last change is usually the best clue.