For Data Values (numbers, percentages, etc.)
- Be sure that there are no spaces before or after your values. ArcMap tries to read these as part of the value field.
- All null/empty fields must be converted to 0.
- ID numbers must be in General format - no numbers or text
- make sure all values for quantities are formatted as numbers
- if error message for number stored as text, change so that this error message no longer occurs.
- Everything formatted as general. Shows up in ArcCatalog as Double
For Addresses (Geocoding)
Be sure that there are no spaces before or after the end of your address, city, zip code, or other letter and number strings. ArcMap tries to read these as part of the name, etc..
Make sure that addresses are split into different fields for street address, city, and postal code.
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Use common abbreviations like Ave, W or St. You may also spell the words out, ie: Lane or Circle.
Double check the spelling for streets and cities.