Variables and Bookpart

[Mark Stephen Mrotek]

Hello,

 

Each movement of a piano piece has a separate file. In each movement the various voices are identified by a variable, e.g., ArightOne, BleftTwo. Each file compiles perfectly individually.

When the file is copied into
\bookpart {

  \header {

}

  Copied here

}

It does not compile correctly and the error:

syntax error, unexpected SYMBOL
appears repeatedly followed by one of the variable names, e.g. ArightOne = \relative c'' {

 

What is my error?

 

Thank you for your kind attention.

 

Mark