I keep getting the following error when applying cross-tabulation on two questions:
Warning: mysql_fetch_row(): supplied argument is not a valid MySQL result resource in /var/www/html/moodle/mod/questionnaire/phpESP/admin/include/where/crosstab.inc on line 187
Warning: mysql_free_result(): supplied argument is not a valid MySQL result resource in /var/www/html/moodle/mod/questionnaire/phpESP/admin/include/where/crosstab.inc on line 195
Warning: mysql_fetch_row(): supplied argument is not a valid MySQL result resource in /var/www/html/moodle/mod/questionnaire/phpESP/admin/include/where/crosstab.inc on line 187
Warning: mysql_free_result(): supplied argument is not a valid MySQL result resource in /var/www/html/moodle/mod/questionnaire/phpESP/admin/include/where/crosstab.inc on line 195
Has anybody manage to generate some useful cross-tab results, as illustrated in the help file?