Problems with multiple Attribute Dimensions

Hello Guys,
when i try to get data from an Essbase database using the Grid API with more then one Attribute Dimension,
the server needs a very long time to response or doesn't response at all.
I encounter the same behaviour when i perform a query using the Excel Query Designer.
Here is a sample query log output:
<subquery>
<cluster size="1">
<dim size="1"><member>MEASURE</member></dim>
<dim size="1"><member>PERIOD</member></dim>
<dim size="1"><member>YEAR</member></dim>
<dim size="1"><member>CATEGORY</member></dim>
<dim size="1"><member>CURRENCY</member></dim>
<dim size="1"><member>CUSTOMER</member></dim>
<dim size="1"><member>PRODUCT</member></dim>
<dim size="1"><member>Business</member></dim>
<dim size="1"><member>black</member></dim>
<dim size="1"><member>Attribute Calculations</member></dim>
</cluster>
</subquery>
<elapsedtime>94.217 seconds
Any help would be appreciated.
Regards,
Martin Brandl

Thanks for the swift response. Always ideas are useful.
As of now , Middleware cannot split the file.
Thing is SAP is creating two Idocs with different message types. Problem is First IDoc contains ORDERS message type but also DELIVERY segments as well. Second IDoc with DELIVERY message tyoe but ORDERS segments as well... This is the problem... I think we are missing some field activation in file for EDIDC record.
As far as I know file port supports the number of IDocs in one file.. Hope TRFC port also supports that

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