Morning all

I have a question regarding Aperture List for Gerber Data.  This is an area
I know little about so bare with me.
We had an incident with a PCB house which resulted in the boards being
manufactured with all traces/pads 0.020" bigger then they were supposed to
be.  The shop said the problem arouse do to the way the aperture list was
set up.
The list has a set of 24 station #s with dimensions (which I understand get
translated to d-codes).  These Station#s are then repeated further down
plus have extra #s to 999.  We noticed that some of the dimensions in the
2nd set of station #s are differant from the 1st set. The 2nd set are the
correct #s.
The shop tells us their software (Infinite Graphics) will import the 1st
set then ignore the 2nd set of repeated #s then will continue to import any
station #s that are differant.
When we look at the Data with GC-Place and look at the used Apertures we
get the correct values.
Could the error be due to a differance in the way the software interprets
the list?..
The customer's data was created using P-Cad at least 10 years ago.  The
format the Lists are in are the same for all the customers product.  A
previous PCB shop had no reported difficulty.

Any ideas would be helpful
Thanks
Andre

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