ORA-19011: Character string buffer too small returned when generating coverage report #1087

begin ut.run(ut_coverage_html_reporter()); end;
Error report -
ORA-19011: Character string buffer too small
ORA-06512: at "UT3.UT_RUNNER", line 180
ORA-06512: at "SYS.DBMS_XMLGEN", line 19
ORA-06512: at "SYS.DBMS_XMLGEN", line 295
ORA-06512: at "UT3.UT_COVERAGE_REPORT_HTML_HELPER", line 190
ORA-06512: at "UT3.UT_COVERAGE_REPORT_HTML_HELPER", line 202
ORA-06512: at "UT3.UT_COVERAGE_REPORT_HTML_HELPER", line 334
ORA-06512: at "UT3.UT_COVERAGE_HTML_REPORTER", line 37
ORA-06512: at "UT3.UT_REPORTER_BASE", line 193
ORA-06512: at "UT3.UT_EVENT_MANAGER", line 70
ORA-06512: at "UT3.UT_EVENT_MANAGER", line 80
ORA-06512: at "UT3.UT_RUN", line 74
ORA-06512: at "UT3.UT_SUITE_ITEM", line 49
ORA-06512: at "UT3.UT_RUNNER", line 172
ORA-06512: at "UT3.UT", line 134
ORA-06512: at "UT3.UT", line 488
ORA-06512: at "UT3.UT", line 558
ORA-06512: at line 1
19011. 00000 -  "Character string buffer too small" 
*Cause:    The string result asked for is too big to return back
*Action:   Get the result as a lob instead