[Cause]
The signature has been expired when you use the file upload Java applet.
[Handling method]
Please download the latest patch from the below URL and apply it after reading the readme.txt which is included together.
http://newsupport.intra-mart.jp/patch/download/ (Japanese)
-- Target ------------------------------------------------------------------------
iWP/Web System Construction Platform/WebPlatform/AppFramework
iWP/Application Series/QuickBinder
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FAQID:801