Problem with the output ports of the data service !!!!! attention

Hi,
I have created a functional module x using abap programming.
The functional module x with one input and one output table.It successfully executed in abap.
Later i activated and used it in visual composer 7.1 .It worked perfectly fine.
The input port displayed was :Hollow Diamond shape
The output port displayed was: Filled Square shape.
Then i thought of changing the abap program by adding one more input and one more output table.
So i have two inputs and tow output tables.
The abap program exceuted correctly.
But when i used it in visual composer 7.1 . It didn't work.
As
The input port displayed was :Hollow Diamond shape ( correct )
The output port displayed was: Filled circle shape.( Not a correct display ).
So i couldn't drag the table output from the circled port.
But When i test the data service then it gives perfect results.
Later i created a new functional module Y with same two inputs and same two output tables. It worked fine.
Please help me . When ever i add new tables to already activated data service i face the same problem.
Kindly advice.
Regards
Tekumalla

Hi,
Following is an image of a slide describing the port types in Visual Composer:
http://img116.imageshack.us/img116/2465/portshapesrt7.png
Which port is appearing on your service?
Would it be possible for you to send a screen shot of your service in VC?
Thanks,
Shai

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Generated Pulse waveform is distorted when I deliver the signal to the output port in the DAQmx

Problem: Generated Pulse waveform is distorted when I deliver the signal to the output port in the DAQmx.
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 Analog Output: 2 Channel 2.00MS/s
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Cycles per Buffer = 80,000 cycles/buffer
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 Buffer Cycle = Sample Rate / Sample per Channel
                          = (2*106 samples / sec) / (1*106 samples/channel)
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[Figure. 1] Frequency 8000 Hz / Cycle per Buffer = 8000 Result
[Figure. 2] Frequency 1000 Hz / Cycle per Buffer = 1000 Result
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1) Is it possible to deliver the generated pulse wave satisfied with constraints (f= 8KHz), △t = 0.5㎲/sample) to the output port without distortion using PXI 6251?
(Is it possible to solve the problem, if I use the LabView or MAX?)
2) Are there some mistakes in the proposed approach? (H/W or S/W program)
3) What is the meaning of the Cycle per Buffer?, It could effect to the result?

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Problem with the output ports of the data service !!!!! attention

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