$host does not have a method messagebox error

I believe you have a spelling error. The "B" in box has to be uppercase. The error message is showing a lower case "b".

I did use an uppercase B. I just pasted the error message incorrectly

There is no good explanation then. Host does have a function called messageBox. Is this an error being reported by FormCalc? or through a thrown exception in the console window?

No popup error displayed while running the form, it only shows the error in the log window of livecycle designer when in preview mode

How about when you run the form in Acrobat? Can you pinpoint the specific line of code that is generating the error?

I'm not sure how to pinpoint the line number using acrobat. Do I use the debugger console?

Use the console window. Take a look at the video link in my signature block.

I looked at the video and that was very good to know for future debugging, but it didn't help in my case because i finally found out it was my formcalc code that was causing the problem. Here is the line of code that is causing the error. When I comment it out, I don't get the error in livecycle. I don't see anything wrong with the code, do you?

if (xfa.host.version<8) then
xfa.host.messageBox("This PDF requires Adobe Reader version 8 or higher. You can download the latest version at: www.adobe.com/reader.")
endif

I see nothing wrong with this code. And I tried it out in Acrobat 8. What version of Acrobat where you trying it in? What happens when you run it in the stand alone Acrobat/Reader?

I'm using Acrobat 9. Reader, Acrobat, and Livecycle all display the message properly when it needs to and also doesn't say it's a problem. The only place that says it's a problem is inside of Log Windows in Livecycle designer when you click the Preview tab.

Here's a way to duplicate it. Simply create a new pdf in livecycle. Then place this code in the initialize event of the form. Then you'll see the error in the log window. If I put it in the click event of a button, then I Don't see the error in the log window

Try moving the code to the DocReady event. I've found that some of the Acrobat JavaScript functions and properties do not exist in the first initialize event. And even though xfa.host.messageBox seems to be a LiveCycle Scripting function, it is actually calling the alert function in the Acrobat DOM.

I appreciate your effort in helping me. I tried that event but it did't work unfortunately. Probably because I'm using Formcalc instead of javascript. But you gave me an idea. I used Javascript instead of Formcalc and kept it in the initialize event and now the error goes away! Problem solved. thank you so much for your help especially on the weekend!