Getting Exclamation Mark Image in the place of FusionCharts -

i'm using fusioncharts in webpage. i'm rendering same portlet fusioncharts twice in page. i'm getting big exclamation mark (!) in grey circle in place of charts. , happens sometimes, i'm not sure how replicate scenario or why happens.

has faced similar issue?

note: div id fusioncharts different in page. same div id not whats causing this.

if can give me solution, great.

screenshot:

unfortunately, cannot share code base in forum. i'm sure there nothing wrong in code because chart renders always. happens still problem.

without code or sample can reproduce this, answer based on checking best practices

1. ensure not have duplicate chart id
2. ensure either re-render existing chart or update data - @ least ensure dispose unneeded charts if re-rendering
3. ensure div chart being rendered "visible" during rendered process.
4. if have many interactive activities charts - tab change, etc... ensure sync them chart events such rendered, disposed, etc (this avoid issues errors in partial rendering of charts)
5. check js console errors when (!) things happen.
6. i curious though ... rendering (!) ... if rendering flash based charts, maybe due flash plugin crashing. try forcing js rendering of charts.