Value &: error in interval entry

What causes this issue?

The value &v1& contains an interval entry. This entry is incorrect.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Please correct your entry according to the following rules for interval
definition.
For characters of the format NUM, DATE or TIME, you can enter a number
or, if this is allowed, an interval.
Intervals must be entered in the following form:
Value1 - value2,,(from value1 to value2)
>Value1,,(greater than value1)
>=Value1,,(greater than or equal to value1)
<Value2,,(less than value2)
<=Value2,,(less than or equal to value2)
>Value1 - <value2,,(greater than value1 and less than value2)
Value1 - <value2,,(greater than or equal to value1 and less than
value2)
>Value1 - value2,,(greater than value1 and less than or equal to value2)

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