Flash chart - Error - No chart data available

Hi
I have a Flash chart that shows the message "Error - No chart data available" (not the no data found message).
If I run its query in sql*plus (using the same parameters) I get 4 rows (with url, label and value columns). I am clueless about how to start investigating this as the chart does not show any other information... Any advice?
What does that message mean? Obviously is something different from no data found?
Thanks
Luis

Hi Marco
Thanks for the reply. I did what you said and found out the problem:
chart Flash Chart error: ORA-20001: get_data error: ORA-20001: Fetch error: ORA-01843: not a valid monthThis was caused because I used the following construction:
where date_from = :p5_date_fromIf this was a report, this would run fine as I set the date format mask using a application level process. However, as Flash charts use separate database connections, they ignore that setting (btw I posted a message about this problem).
I fixed it hardcoding a format mask in my SQL. Not nice but it works!
Thanks
Luis

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<anygantt> <resource_chart>
<resources>
<resource id="341" name="Drexler, Franz" />
<resource id="5" name="Gross, Johannes-Ludwig" />
<resource id="8" name="Pecherski, Andrzej" />
<resource id="131" name="Steinmetz, Raphael" />
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<period resource_id= "8" start="27-DEC-12 12.00.00.000000000 AM" end="28-DEC-12 12.00.00.000000000 AM" style="green" />
<period resource_id= "8" start="02-JAN-13 12.00.00.000000000 AM" end="04-JAN-13 12.00.00.000000000 AM" style="green" />
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<period resource_id= "131" start="22-DEC-12 12.00.00.000000000 AM" end="31-DEC-12 12.00.00.000000000 AM" style="green" />
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<period resource_id= "33" start="26-DEC-12 12.00.00.000000000 AM" end="28-DEC-12 12.00.00.000000000 AM" style="green" />
<period resource_id= "33" start="25-FEB-13 12.00.00.000000000 AM" end="25-FEB-13 12.00.00.000000000 AM" style="red" />
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<period resource_id= "33" start="12-JUN-13 12.00.00.000000000 AM" end="12-JUN-13 12.00.00.000000000 AM" style="red" />
<period resource_id= "33" start="26-AUG-13 12.00.00.000000000 AM" end="26-AUG-13 12.00.00.000000000 AM" style="red" />
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