If you start Progres with the option '-n' no windows are opened. The graphpool is
created by the information in a despription file.
"Progres -n PROJECT" creates a new pool in $GRAS. An existing pool is deleted.
The description file for the new pool is located in $IPSENBACKUP with the
name '$PROJECT.pd'. Normally $IPSENBACKUP is set to $DATAROOT/backups/$PROJECT.
If you use this tool for the first time you have to create a new directory $PROJECT
in $DATAROOT/backups. Create the file $PROJECT.pd.

An examle for a pool description file:
# Sample pool description file 
# Pool will be created in $GRAS.
# relation may may be one of {none, succ of <spec>, exec of <spec>}.
# mode may be one of {create, read, analyze, generate, insert}.
# gendir determines the place for the generated code. The path is relative
# to $IPSENBACKUP. The default is generated.

#
# FerryMan
#
# Name of the specification in Progres
spec: FerryMan
# Name of your textual specification file relative to $IPSENBACKUP
file: FerryManWithErrors.spec
# Relation to another document
relation: none
# State of the document
mode: generate
# Directory for the generated code relative to $IPSENBACKUP
gendir: generatedCode

# FerryManNoErrors
spec: FerryManNoErrors
file: FerryManNoErrors.spec
relation: succ of FerryMan
mode: analyze

# TBTrees
spec: TBTrees
file: TBTrees.spec
relation: none
mode: analyze

# IREEN
spec: IREEN
file: IREEN.spec
# This specifications contains sections with the comments
# @CC_InsertBackup
relation: none
mode: insert
# The graph IREEN is copied into the new graph IREEN_generated.
# There the sections containing @CC_InsertBackup are replaced by
# files which are placed in a subdirectory with the name IREEN.
# Finally code is generated for IREEN_generated.
gendir: generatedCode

