---
title: FORM Butler – Web Forms – Best Practices handling Objects with multiple Underscores on the Object API Name.
description: "When creating a new Variable in Salesforce Flow, you must follow specific naming rules for the **Object API Name** field. Violating these rules will prevent the variable from being saved. ### **Naming Rules** - ✅ **Use single underscores between words***(e.g.…"
url: "https://pdfbutler.com/academy/form-butler-academy/form-butler-web-forms/form-butler-web-form-best-practices-handling-objects-with-multiple-underscores-on-the-object-api-name/"
updated: "2026-03-26"
category: Web Forms
---

# FORM Butler – Web Forms – Best Practices handling Objects with multiple Underscores on the Object API Name.

When creating a new Variable in Salesforce Flow, you must follow specific naming rules for the **Object API Name** field. Violating these rules will prevent the variable from being saved.

### **Naming Rules**

- ✅ **Use single underscores between words***(e.g. cadmusformProject_forCreate)*
- ✅ **Write all words together with no underscores (merged)***(e.g. cadmusformProjectforCreate)*
- ❌ **Do NOT use double underscores ("__")***(e.g. cadmus_form__Project_forCreate)*
- ❌ **Do NOT start or end the name with an underscore***(e.g. _cadmusformProject or cadmusformProject_)*

**💡 Tip**

If your intended name contains double underscores (**"__"**), simply remove all underscores and write the name merged together.

**Example**

cadmus_form__Project__c  ->  cadmusformProject_forCreate  (all underscores removed, suffix _forCreate kept)

#### **Why this restriction exists**

This is a Salesforce platform restriction — double underscores (**__**) are reserved for custom objects and fields (e.g. *My_Object__c*) and therefore cannot be used in Flow variable API names.

### **Screenshots — Step by Step**

#### **Step 1**

Enter the original object name with double underscores — Salesforce will show a validation error:

![](https://pdfbutler.com/wp-content/uploads/2026/03/Picture2.jpg)

*❌  cadmus_form__Project_forCreate — invalid, double underscores not allowed*

 

#### **Step 2**

Remove all underscores from the object name prefix and use the merged version — the variable saves successfully:

![](https://pdfbutler.com/wp-content/uploads/2026/03/Picture3.jpg)

*✅  cadmusformProject_forCreate — valid, variable saved successfully*

 

### **Where to Find the Field API Name & How to Use It in Flow**

**Field API Name in Actionable —**This is the original Field API Name as it appears in the FORM Butler configuration (e.g. cadmus_form__Project__c). Note the double underscores — this value cannot be used directly in Flow.

![](https://pdfbutler.com/wp-content/uploads/2026/03/Picture4.jpg)

*Field API Name in Actionable — cadmus_form__Project__c*

**Variable API Name in Flow —**When creating the corresponding variable in Salesforce Flow, remove all underscores from the object name prefix. Use the merged version: cadmusformProject_forCreate.

![](https://pdfbutler.com/wp-content/uploads/2026/03/Picture5.jpg)

*Variable API Name in Flow — cadmusformProject_forCreate*