# Drain Survey mode performed in error.
**Symptoms**:
Drain line is present in the elevation data path.
**Possible cause**:
T3C user has recorded in Drain survey mode instead of Field survey mode as intended. Drain lines are in a swath pattern across the field.
**Solutions**:
If a user does not wish to resurvey in Field survey mode, they can:
1. Delete drain line T3RRA Design (T3RRA Cutta owners only).
1. Load the project into T3RRA Design
2. Delete the drain line on the Guide tab
3. Export a control file for T3C
2. In Collect step of Wizard:
1. Export data as CSV file
2. Import CSV file into T3RRA Cutta v2.
