[Error] Undefined variable

Hi there,

I am seeing this error when PHP debug is turned on:

Notice: Undefined variable: columns in /www/wp-content/plugins/maxicharts/maxicharts.php on line 739 Notice: Undefined variable: rows in /www/wp-content/plugins/maxicharts/maxicharts.php on line 740 Notice: Undefined variable: header_size in /www/wp-content/plugins/maxicharts/maxicharts.php on line 747 Notice: Array to string conversion in /www/wp-content/plugins/maxicharts-gravity-forms-source-add-on/mcharts_gf_source_add_on.php on line 631 Notice: Array to string conversion in /www/wp-content/plugins/maxicharts-gravity-forms-source-add-on/mcharts_gf_source_add_on.php on line 631 Notice: Undefined index: data_conversion in /www/wp-content/plugins/maxicharts/mcharts_data_conversion_plugin.php on line 144 Notice: Undefined index: multisets in /www/wp-content/plugins/maxicharts/maxicharts.php on line 841 Notice: Undefined index: multisets in /www/wp-content/plugins/maxicharts/maxicharts.php on line 1093 Notice: Undefined variable: javascript_code_to_inject in /www/wp-content/plugins/maxicharts/maxicharts.php on line 1220 Notice: Undefined variable: columns in /www/wp-content/plugins/maxicharts/maxicharts.php on line 739 Notice: Undefined variable: rows in /www/wp-content/plugins/maxicharts/maxicharts.php on line 740 Notice: Undefined variable: header_size in /www/wp-content/plugins/maxicharts/maxicharts.php on line 747 Notice: Array to string conversion in /www/wp-content/plugins/maxicharts-gravity-forms-source-add-on/mcharts_gf_source_add_on.php on line 631 Notice: Array to string conversion in /www/wp-content/plugins/maxicharts-gravity-forms-source-add-on/mcharts_gf_source_add_on.php on line 631 Notice: Undefined index: data_conversion in /www/wp-content/plugins/maxicharts/mcharts_data_conversion_plugin.php on line 144 Notice: Undefined index: multisets in /www/wp-content/plugins/maxicharts/maxicharts.php on line 841 Notice: Undefined index: multisets in /www/wp-content/plugins/maxicharts/maxicharts.php on line 1093 Notice: Undefined variable: javascript_code_to_inject in /www/wp-content/plugins/maxicharts/maxicharts.php on line 1220 Notice: Undefined variable: columns in /www/wp-content/plugins/maxicharts/maxicharts.php on line 739 Notice: Undefined variable: rows in /www/wp-content/plugins/maxicharts/maxicharts.php on line 740 Notice: Undefined variable: header_size in /www/wp-content/plugins/maxicharts/maxicharts.php on line 747 Notice: Array to string conversion in /www/wp-content/plugins/maxicharts-gravity-forms-source-add-on/mcharts_gf_source_add_on.php on line 631 Notice: Array to string conversion in /www/wp-content/plugins/maxicharts-gravity-forms-source-add-on/mcharts_gf_source_add_on.php on line 631 Notice: Undefined index: data_conversion in /www/wp-content/plugins/maxicharts/mcharts_data_conversion_plugin.php on line 144 Notice: Undefined index: multisets in /www/wp-content/plugins/maxicharts/maxicharts.php on line 841 Notice: Undefined index: multisets in /www/wp-content/plugins/maxicharts/maxicharts.php on line 1093 Notice: Undefined variable: javascript_code_to_inject in /www/wp-content/plugins/maxicharts/maxicharts.php on line 1220 Notice: Undefined variable: columns in /www/wp-content/plugins/maxicharts/maxicharts.php on line 739 Notice: Undefined variable: rows in /www/wp-content/plugins/maxicharts/maxicharts.php on line 740 Notice: Undefined variable: header_size in /www/wp-content/plugins/maxicharts/maxicharts.php on line 747 Notice: Array to string conversion in /www/wp-content/plugins/maxicharts-gravity-forms-source-add-on/mcharts_gf_source_add_on.php on line 631 Notice: Array to string conversion in /www/wp-content/plugins/maxicharts-gravity-forms-source-add-on/mcharts_gf_source_add_on.php on line 631 Notice: Undefined index: data_conversion in /www/wp-content/plugins/maxicharts/mcharts_data_conversion_plugin.php on line 144 Notice: Undefined index: multisets in /www/wp-content/plugins/maxicharts/maxicharts.php on line 841 Notice: Undefined index: multisets in /www/wp-content/plugins/maxicharts/maxicharts.php on line 1093 Notice: Undefined variable: javascript_code_to_inject in /www/wp-content/plugins/maxicharts/maxicharts.php on line 1220

Its showing on pages using the following shortcode:
[gfchartsreports]