Variables that are text-based (filenames etc) are best entered using the 'text' definition as this allows for more characters to be used, e.g.
text filename = my_very_long_filename text vname = string
where string is any character string. If string includes embedded blanks, it must be enclosed in single quotes. Examples of the use of SYMB and TEXT commands to assign character variables are:
symb speed = 38.756 /* real number assignment symb index = 12 /* integer assignment symb option = on /* short character string assignment text filename = /usr/files/data /* long character string assignment text title = 'figure 1. calculation results' /* with embedded blanks