Problem with Call_Form to Return to the Previous Screen with Saved Results

Question

Hello All,
I have two forms (e.g. Form A & Form B) both forms have options to call one another with a Push Button included in the form. Our users want to be able to return to Form B from Form A with a previous search result and parameters saved in Form B. I was able to use the following code to make this happen:
1. In Form B, I added the following code in the When-Button-Pressed Trigger for the 'PB_Return_2_Form_A' item:
CALL_FORM('Form_A', HIDE,NO_REPLACE, NO_QUERY_ONLY);
2. In Form A, I used the following code in the When-Button-Pressed Trigger for the 'PB_Return_2_Form_B' item:
EXIT_FORM;
The above code works beautifully when I enter form B first and search the database with all the required parameters entered, the parameters and search results were displayed upon return from Form A. But the problem is when I enter Form A first, the form exits abruptly. I tried to use pre-condition testing in Form A such as the following code:
IF :GLOBAL.DWR01_First_Call = 'Y' THEN
NEW_FORM('DWR_SEL', NO_ROLLBACK);
:GLOBAL.DWR01_First_Call := 'N';
ELSE
EXIT_FORM;
END IF;
(BTW, I initialize the :GLOBAL.DWR01_First_Call variable to 'Y' in the 'When-New-Form-Instance' Triggers in the form level.) But the above code does not work. For some reason this :GLOBAL.DWR01_First_Call = 'Y' condition always gets executed such that the working part of code is by-passed.
If any of you can help me on resolving my problem asap, I would really appreciate it.
Thanks to you all in advance,
Jinlan
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Answer 1

Thanks all for the information and help. I have read through the information provided in the links above, and modified the global variable accordingly in both the calling and called forms, but all tries failed. From my failed attempts, I realize that my current design might not work because the value of GLOBAL.DWR01_First_Call seems to be 'Y' each time when Form A is called as such the 'EXIT_FORM' statement in the ELSE condition will never be executed. This intrigues me with the following questions:
I. How do I use the debug in Forms 6i to step thru the values of a variable at a given execution state? (Although, I am pretty certain that the :GLOBAL.DWR01_First_Call value is always going to be a 'Y' each time when Form A is called, it would be nice if I could see it myself and not just guessing. :) )
II. By now, I am pretty sure my current design may not work... How do I make my code to work for the situation I described above? For your convenience, I restate my situation again below and hopefully it will clarify my needs:
Both Form A and Form B have options to call one another with a Push Button included in each form. Our users want to be able to return to Form B from Form A with a previous search result and parameters saved in Form B, and the following code works:
1. In Form B, I added the following code in the When-Button-Pressed Trigger for the 'PB_Return_2_Form_A' item:
CALL_FORM('Form_A', HIDE,NO_REPLACE, NO_QUERY_ONLY);
2. In Form A, I used the following code in the When-Button-Pressed Trigger for the 'PB_Return_2_Form_B' item:
EXIT_FORM;
But, the above code kicks the user out of the application completely if the user enter Form A first and then select Form B by pressing the 'PB_Return_2_Form_B' push button(BTW, this access mechanism is most commonly used by our users). So, how do I allow users to enter Form A first and allow them to call Form B and proceed with entering parameters and search query, without exiting the form.
Any and all the help you can provide on this will be greatly appreciated.
Thanks millions in advance,
Jinlan Tomasic
[email protected]
1(907)458-6899