I'm stumped here. I've seen this error in other posts but not quite in the same context. I'm trying to run the `arcpy.management.CreateRelationshipClass()` tool in ArcGIS 10.0. Absolutely everything I've tried throws the 000840 error. I ultimately want to run the tool from a Python script, but for now I'm trying in the Python window in ArcMap. Here's my code:

```
import arcpy
from arcpy import env
env.workspace = 'C:/mulleady'
arcpy.management.CreateRelationshipClass('temp/SOIL_HYDROGROUP.dbf',
    'temp/WUH_Soil_Statistics.dbf', 'temp/relclass', 'SIMPLE', 'forward',
    'backward', 'NONE', 'ONE_TO_MANY', 'NONE', 'IL_SOIL', 'IL_SOIL')

```

I tried `\\` instead of `/` in the pathnames, I tried to name the directory `temp.gdb` instead of `temp`, I ran `arcpy.ValidateFieldName()`, I tried absolute paths, I've tried a bunch of stuff that hasn't worked.

An even stranger thing to me is, is that I'm getting the same error even when I try to run the tool from ArcToolbox > Create Relationship Class:

![CreateRelationshipClass_error](https://i.stack.imgur.com/vBlmy.png)

Any thoughts?

**Edit**

I created a file geodatabase and copied my two .dbf files into it. Now when I try to create a relationship class I get this error. I changed my workspace and scratch workspace to the path of the fgbd folder. What am I doing wrong now?

![CreateRelationshipClass_error_2](https://i.stack.imgur.com/bVn6q.png)