Every script in SQL Size requires a Main procedure. It as defined as such:

Each line needs to be terminated with a semi-colon (;), except for a begin block. Functions and procedures need to be defined before they can be called. The following script is invalid because Foo is called before it is defined.

The script needs to be rewritten to define Foo before it is called i.e.

This basically means that the Main procedure is usually the last procedure in the script, if it calls other procedures and functions.

Every procedure and function must contain a begin..end block. Variables are defined using the var keyword, and is defined before the begin block. You can define variables for the basic data types, and also for the classes supported by the script engine.