### 5.5.8. Troubleshooting

The topics in this section include:

- Resolving Execution Control Conflicts
- Resolving a 2-Way FSI Error

#### 5.5.8.1. Resolving Execution Control Conflicts

If you add or change Execution Control in CFX-Pre in a way that is perceived to conflict with the Execution Control settings stored in the Solution cell, an error message appears when you attempt to update the Solution cell.

To resolve the error, right-click the Solution cell and choose one of the following options:

- Using execution control from Setup cell

- Using execution control from Setup cell always

- Using execution control from Solution cell

- Using execution control from Solution cell always

The Using execution control from `Setup|Solution` cell options enable you to decide how to resolve the conflict on a case-by-case basis. Alternatively, you can choose one of the Using execution control from `Setup|Solution` cell always options. The latter options change your Workbench preference. To change the preference manually, select (from Workbench) Tools > Options > CFX and change the value of the Set the default execution control conflict option for the solution cell field, which specifies the default value for the Solution cell property “Execution Control Conflict Option”. For details, see the description for “Execution Control Conflict Option” in Properties View in the CFX Introduction.

#### 5.5.8.2. Resolving a 2-Way FSI Error

In some circumstances after you have set up a 2-way FSI case and attempted to start the run, you may see the following error:

    The Mechanical Input File specified on the MultiField tab was not found.
    Please specify a valid Mechanical Input File.

This happens when the solver control has been edited after the execution control is already set. The workaround is to close the Solver Manager, reset the Solution cell, and re-edit the solver control.

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