I need to validate input on a screen flow's text field so that only "EB, EO, GA" are acceptable inputs from the user (Normally I'd just use a picklist but the client wants to leverage an existing standard field and its Text type).

How would I go about handling this via a formula? Alternatively, just restricting it to being 2 all caps letters would suffice.

I tried using LEN({!Text_Input_Field_From_Screen_Flow} <> 2) && REGEX({!Text_Input_Field_From_Screen_Flow}, "[A-Z] {2}") but getting a syntax error: The formula expression is invalid: Incorrect parameter type for operate '<>'. Expected Text, received Number"

I need to validate input on a screen flow's text field so that only "EB, EO, GA" are acceptable inputs from the user (Normally I'd just use a picklist but the client wants to leverage an existing standard field and its Text type).

How would I go about handling this via a formula? Alternatively, just restricting it to being 2 all caps letters would suffice.

I tried using

LEN({!Text_Input_Field_From_Screen_Flow} <> 2) &&
REGEX({!Text_Input_Field_From_Screen_Flow}, "[A-Z] {2}")

but getting a syntax error: The formula expression is invalid: Incorrect parameter type for operate '<>'. Expected Text, received Number"

I need to validate input on a screen flow's text field so that only "EB, EO, GA" are acceptable inputs from the user (Normally I'd just use a picklist but the client wants to leverage an existing standard field and its Text type).

How would I go about handling this via a formula? Alternatively, just restricting it to being 2 characters would suffice.

I tried using OR() but wasn't successful as it expected boolean values not text...

I need to validate input on a screen flow's text field so that only "EB, EO, GA" are acceptable inputs from the user (Normally I'd just use a picklist but the client wants to leverage an existing standard field and its Text type).

How would I go about handling this via a formula? Alternatively, just restricting it to being 2 all caps letters would suffice.

I tried using LEN({!Text_Input_Field_From_Screen_Flow} <> 2) && REGEX({!Text_Input_Field_From_Screen_Flow}, "[A-Z] {2}") but getting a syntax error: The formula expression is invalid: Incorrect parameter type for operate '<>'. Expected Text, received Number"

I need to validate input on a screen flow's text field so that only "EB, EO, GA" are acceptable inputs from the user (Normally I'd just use a picklist but the client wants to leverage an existing standard field and its Text type). How would I go about handling this via a formula? Alternatively, just restricting it to being 2 characters would suffice.

I tried using OR() but wasn't successful as it expected boolean values not text...

I need to validate input on a screen flow's text field so that only "EB, EO, GA" are acceptable inputs from the user (Normally I'd just use a picklist but the client wants to leverage an existing standard field and its Text type). 

How would I go about handling this via a formula? Alternatively, just restricting it to being 2 characters would suffice.

I tried using OR() but wasn't successful as it expected boolean values not text...