Error message when posting new record in Form

[HFJ]

Good afternoon.
I am new to this so I ask you to be a little patient with me and excuse my ignorance.
I just finish building a rather simple database (3 basic tables and 1 basic form).
In the form, whenever I try to save an entry I get an error message stating that there is an “error inserting the new record.” I will include an screen image of it at the end of this.
I revised all the properties in both tables and the form and don’t seem to be able to figure out what is causing it.
Any help with this would be greatly appreciated.

Note: unable to include photo even via a link.
The message says:
“error inserting the new record”
and below it "attempt to insert null into a non-nullable column: column: RecipeID table: tblRecipe in statement [INSERT INTO “tblRecipe” ( “ethnicity”, “file”, “recipename”, “type”) VALUES (?,?,?,?)]

[Ratslinger]

Hello,
This appears to be an issue with the Primary Key field of the table RecipeID. Would think this is set as a type of Integer.
.
It can have a property for AutoValue of Yes or No:

.
If set to No then you must have a field on the form and enter a unique value for this field.
.
If set to Yes it will automatically set the next incremented value.
.
This is most likely where you problem lies. If not will need more details on the table & form construct. Samples always helpful.

[HFJ]

Ratslinger,
thank you for replying so quickly and for your suggestion.
I reviewed my entries and you were right. I am so, incredibly embarrassed. Such a minor thing! So It worked and I hope it keeps on working. I really appreciate your input.
Once again thank you.