how to resolve this erreor net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error evaluating expression for source text: ?

[pg101991]

i have ol jaspers that was create on ireport 5.1.0. but now i have compiled on jasperstudio 6.4.0.when i integrate in my sprinh hibernate project i got this effroe " net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error evaluating expression for source text: $F{itemName}!=null".

 

pls help me, thanks in advance

[misrain.ganon]

Lo mismo me sucede al mismo de compilar con jasper studio 6.4.3 "net.sf.jasperreports.engine.JRException: net.sf.jasperreports.engine.JRRuntimeException: Could not resolve style(s): net.sf.jasperreports.engine.design.JRDesignStyle@646bfe74, text." 

 

Ayuda por favor 

 

Saludos de antemano