800xA Batch Compute BMA problems with dynamic content

I have designed a function, where I will use a Compute BMA to issue an ODBC call which uses a Windows application (an executable) to read and return data from a SQL database.

My problem is related to the syntax required by the Compute BMA, where the Command string must be enclosed in double quotes, but I have to be able to dynamicaly set one part of the command string, instructing what to read from the SQL database.

When I use a static string as e.g.: "MyApplication MyKey", it works fine and I do get the expected result returned in the Compute BMA's output variable.

The problem I have is as simple as I can not figure out, how to be able to have the element: MyKey as dynamic, where it is assigned its value from e.g. a Message BMA.

I have tried to use a Compute BMA to create the string, but I cannot get it to include the pair of double quotes required.

Pls. if anyone know how I can do this, I'll be thankfull.

Regards,

Frede