sun.misc.ServiceConfigurationError

[F C]

Bonjour

I have an applet allowing the export of a canvas as a png file,
the web server is tomcat.

When I try to use the applet feature "export as a png file"

I have in the java console
the following message:
sun.misc.ServiceConfigurationError
javax.imageio.spi.ImageInputStreamSpi:
http://url/webApplication/META-INF/services/javax.imageio.spi.ImageInputStreamSpi:4:
Illegal configuration-file syntax
at sun.misc.Service.fail(Service.java:129)
at sun.misc.Service.fail(Service.java:135)
at sun.misc.Service.parseLine(Service.java:157)
at sun.misc.Service.parse(Service.java:206)
at sun.misc.Service.access$100(Service.java:111)
at sun.misc.Service$LazyIterator.hasNext(Service.java:257)
at javax.imageio.spi.IIORegistry.registerApplicationClasspathSpis(IIORegistry.java:173)
at javax.imageio.spi.IIORegistry.<init>(IIORegistry.java:113)
at javax.imageio.spi.IIORegistry.getDefaultInstance(IIORegistry.java:134)
at javax.imageio.ImageIO.<clinit>(ImageIO.java:46)

Thank you for any advise
F