Erro Jasper Report

Olá pessoal, alguém pode me explicar esse erro:
init:
deps-jar:
compile-single:
run-single:
Exception in thread "main" java.io.IOException: CreateProcess: javac -classpath "C:\Arquivos de programas\netbeans-5.0\platform6\modules\ext\swing-layout-1.0.jar;D:\Projetos\Sifi\dist\lib\mysql-connector-java-5.0.3-bin.jar;D:\Projetos\Sifi\dist\lib\jasperreports-1.2.5.jar;D:\Projetos\Sifi\dist\lib\nachocalendar-0.23.jar;D:\Projetos\Sifi\dist\lib\iReport.jar;D:\Projetos\Sifi\dist\lib\barbecue-1.1.jar;D:\Projetos\Sifi\dist\lib\commons-beanutils-1.5.jar;D:\Projetos\Sifi\dist\lib\commons-collections-2.1.jar;D:\Projetos\Sifi\dist\lib\commons-dbcp-1.2.1.jar;D:\Projetos\Sifi\dist\lib\commons-digester-1.7.jar;D:\Projetos\Sifi\dist\lib\commons-javaflow-20060411.jar;D:\Projetos\Sifi\dist\lib\commons-logging-1.0.2.jar;D:\Projetos\Sifi\dist\lib\commons-logging-api-1.0.2.jar;D:\Projetos\Sifi\dist\lib\commons-pool-1.3.jar;D:\Projetos\Sifi\dist\lib\dom4j-1.6.jar;D:\Projetos\Sifi\build\classes" D:\Projetos\Sifi\ContasPagasFixaDiaria_1162855817794_766228.java error=2
        at java.lang.ProcessImpl.create(Native Method)
        at java.lang.ProcessImpl.<init>(ProcessImpl.java:81)
        at java.lang.ProcessImpl.start(ProcessImpl.java:30)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:451)
        at java.lang.Runtime.exec(Runtime.java:591)
        at java.lang.Runtime.exec(Runtime.java:464)
        at net.sf.jasperreports.engine.design.JRJavacCompiler.compileClasses(JRJavacCompiler.java:62)
        at net.sf.jasperreports.engine.design.JRAbstractClassCompiler.compileUnits(JRAbstractClassCompiler.java:67)
        at net.sf.jasperreports.engine.design.JRAbstractCompiler.compileReport(JRAbstractCompiler.java:189)
        at net.sf.jasperreports.engine.design.JRDefaultCompiler.compileReport(JRDefaultCompiler.java:105)
        at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:211)
        at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:144)
        at br.com.sifi.relatorios.RelatorioContasPagasFixaDiaria.geraRelatorio(RelatorioContasPagasFixaDiaria.java:42)
        at br.com.sifi.relatorios.RelatorioContasPagasFixaDiaria.main(RelatorioContasPagasFixaDiaria.java:50)

NESTED BY :
net.sf.jasperreports.engine.JRException: Error compiling report java source files : D:\Projetos\Sifi\ContasPagasFixaDiaria_1162855817794_766228.java 
        at net.sf.jasperreports.engine.design.JRJavacCompiler.compileClasses(JRJavacCompiler.java:93)
        at net.sf.jasperreports.engine.design.JRAbstractClassCompiler.compileUnits(JRAbstractClassCompiler.java:67)
        at net.sf.jasperreports.engine.design.JRAbstractCompiler.compileReport(JRAbstractCompiler.java:189)
        at net.sf.jasperreports.engine.design.JRDefaultCompiler.compileReport(JRDefaultCompiler.java:105)
        at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:211)
        at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:144)
        at br.com.sifi.relatorios.RelatorioContasPagasFixaDiaria.geraRelatorio(RelatorioContasPagasFixaDiaria.java:42)
        at br.com.sifi.relatorios.RelatorioContasPagasFixaDiaria.main(RelatorioContasPagasFixaDiaria.java:50)
Caused by: java.io.IOException: CreateProcess: javac -classpath "C:\Arquivos de programas\netbeans-5.0\platform6\modules\ext\swing-layout-1.0.jar;D:\Projetos\Sifi\dist\lib\mysql-connector-java-5.0.3-bin.jar;D:\Projetos\Sifi\dist\lib\jasperreports-1.2.5.jar;D:\Projetos\Sifi\dist\lib\nachocalendar-0.23.jar;D:\Projetos\Sifi\dist\lib\iReport.jar;D:\Projetos\Sifi\dist\lib\barbecue-1.1.jar;D:\Projetos\Sifi\dist\lib\commons-beanutils-1.5.jar;D:\Projetos\Sifi\dist\lib\commons-collections-2.1.jar;D:\Projetos\Sifi\dist\lib\commons-dbcp-1.2.1.jar;D:\Projetos\Sifi\dist\lib\commons-digester-1.7.jar;D:\Projetos\Sifi\dist\lib\commons-javaflow-20060411.jar;D:\Projetos\Sifi\dist\lib\commons-logging-1.0.2.jar;D:\Projetos\Sifi\dist\lib\commons-logging-api-1.0.2.jar;D:\Projetos\Sifi\dist\lib\commons-pool-1.3.jar;D:\Projetos\Sifi\dist\lib\dom4j-1.6.jar;D:\Projetos\Sifi\build\classes" D:\Projetos\Sifi\ContasPagasFixaDiaria_1162855817794_766228.java error=2
        at java.lang.ProcessImpl.create(Native Method)
        at java.lang.ProcessImpl.<init>(ProcessImpl.java:81)
        at java.lang.ProcessImpl.start(ProcessImpl.java:30)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:451)
        at java.lang.Runtime.exec(Runtime.java:591)
        at java.lang.Runtime.exec(Runtime.java:464)
        at net.sf.jasperreports.engine.design.JRJavacCompiler.compileClasses(JRJavacCompiler.java:62)
        ... 7 more
Java Result: 1
BUILD SUCCESSFUL (total time: 6 seconds)
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