> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Unit Mismatch

## Incompatible units in input

### About the error

| Related Error Messages                        |
| :-------------------------------------------- |
| Incompatible units in input positions 3 and 4 |
| Incompatible units in input positions 0 and 2 |

**Issue:**
The inputs within the block have mismatching units. Depending on the input, the units need to be the same as other inputs in the block.

**Cause:**

* Inputs within the same block have different units.
* Inputs don’t have any assigned units and were expecting units.
* One input has one unit defined but the other is undefined.

**Solution:**

* Type in the correct unit in the input.

*Ex. The units in inputs ‘In Min’ (Length) and ‘Out Min’ (Mass) do not match. Ensure that both input units match to run this block.*

| Example                                                                                                    | Reason                                                                                                                                                    |
| :--------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------------------------------------------------------------------------------------------- |
| ![Unit Mismatch](https://storage.googleapis.com/files-learn/static/images/error_doc/unit_mismatch_ex1.jpg) | INCOMPATIBLE UNITS:No units assigned in In min or In max. Theyneed to match the Field units. Field units areautomatically chosen based on the Field Type. |
| ![Unit Mismatch](https://storage.googleapis.com/files-learn/static/images/error_doc/unit_mismatch_ex2.jpg) | INCOMPATIBLE UNITS:The units in In min and In max don’t matchthe Field units. They need to match the Field Units.                                         |

***