# Summary of Error Codes

When a safety factor cannot be calculated for a slip surface, *Slide3* will write an error code to the output file, rather than a safety factor. These error codes are NEGATIVE numbers such as â€“101, -102, -103 etc. The figure below shows an example of some of the error codes you may encounter while running the analysis.

These error codes are displayed when you select**: Interpret > Show Error Codes.**

The meaning of these error codes are summarized below.

Error Code | Explanation |

-97 | Factor of safety is out of valid range set by user. |

-99 | Slip surface intersects through an infinite strength material. |

-111 | Safety factor equation did not converge. |

-113 | Surface intersects outside search limits. |

-114 | Surface with reverse curvature. |

-115 | Surface depth is not within the user defined min/max values. |

-121 | Concave failure surface. Only convex slip surfaces are allowed. |

-127 | Weight of slipping mass is not within the user defined min/max values. |

-128 | Volume of slipping mass is not within the user defined min/max values. |

-129 | Columns fall outside of the search limits. |

-130 | Too many failed attempts to create a valid surface. To see most common error types check Interpret>Show Error Codes. |

-131 | One or more columns had base points that were not within the soil model. |

-132 | Error in discretization - No active columns. |

-134 | Error in discretization - Too few active columns. |

-135 | Can not interpolate discrete strength function. |

-136 | Surface elevation violates the user define cutoff(s). |

-137 | Axis of symmetry is not passing through search limits. |

-139 | Non-spherical Auto-Refine Search not supported. Change the Surface Type to Spheres in the Slip Surface. |

-140 | None of the grid points in Auto Refine Search produced a valid slip surface. To see a list of error codes check Interpret > Show Error Codes. |

-141 | Surface elevation below external geometry. You may try external geometry composite surface option. |

-142 | Wedge persistence exceeding the user-defined limit. |

-143 | Failed to form a valid wedge slip surface. |

-144 | No search planes defined for multi-planar search. |

-145 | Failure mass has invalid boundary columns. |

-150 | Surface intersects outside search limits (gridpoint discretization)."); } break; |

-151 | Surface does not intersect specfied Intersects search limit."); } break; |

-152 | Surface intersects outside search limits (edge of slip surface)."); } break; |

-153 | Surface touches edge of model limits."); } break; |

-200 | Factor of Safety <= min iteration value. Could mean 0 Normal/Shear resistance along part of the slip surface. |

-402 | Unable to compute factor of safety due to symmetric forces/moments canceling out each other along X/Y axes. |

-403 | Could not compute initial failure direction, possibly flat ground surface. |

-404 | Computed lambda values outside specified range in the advanced project settings. |

-405 | Nonlinear equation solver failed to find a solution. |

-406 | Failed to compute factor of safety. |

-407 | Iteration of the intercolumn lambda value failed to find a solution. |

-408 | Iteration of the failure direction failed to find a solution. |

-409 | Failed to compute a shear force given a normal force. |

-410 | Computing a negative factor of safety. |

-411 | Too much tension, amount of tension exceeds the limit defined in the advanced options. |

-412 | Iteration of Ky did not converge. |

-413 | A column base angle exceeds the limit in the advanced project settings. |

-700 | Surface Altering Optimization failed to converge. |

-800 | Not enough memory available to perform the computation. |

-900 | Failed to successfully extract external boundary polyline. This indicates likelihood of invalid computation |

-901 | 3D geology structure with zero volume detected. |

-902 | Non-manifold 3D geology structure (open polyhedron) detected. |

-1000 | No valid slip surfaces generated to compute factor of safety. Check Interpret>Show Error Codes dialog for further details. |

1000 | User aborted computation. |

0 | Unknown error. |