You used the @SOLU solution report function incorrectly.  This function displays the standard LINGO solution report and may be called in calc sections.  Proper usage is:

 @SOLU( [0|1[, OBJECT_NAME[, ''HEADER_TEXT'']]]);

where the first argument is set to 1 if only nonzero variable values are desired (and binding rows), OBJECT_NAME is the optional name of an object to report on (the entire report will be generated otherwise), and the optional HEADER_TEXT is a header line to display in the report.  Please refer to the documentation on @SOLU for more details.