A few points to remember

The following are some noteworthy points regarding data manipulation in a Flow:

• Make sure that the field is set as Input and Output to pass values from the controller.
• Use the <apex:param> component in the Visualforce page to set the variables' value.
• Use the start() method in the Flow.Interview class to call a Flow from a controller.
• Using the standard list controller, you can set the SObject Collection Variable value from the standard controller.
• If you have embedded a Flow into a Visualforce page and Flow is not activated, then at runtime, Flow users will receive an error.
• Once you have deactivated a Flow, you can immediately delete it.
• If you are using the same choice in multiple screens on a Flow and you want to find the recent one, then use was selected in your query.
• To set the record type for a record, use the record type ID.
• If the Flow Designer doesn't show the custom object or fields you recently created, then close the Flow Designer and reopen it.
• If the...