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- We are currently working with an IBM workflow application called FormWave and running an electronic approval system.
- Currently we are working at home and using VPN((wifi at home).
- We are struggling with the investigation because there is a problem that the file is damaged when uploaded via VPN.
- Corruption means that when viewed with a binary editor, some data becomes zero bytes.
- -Environment and Conditions
- ・App: IBM FormWave for WebSphere 6.1.2.3
- ・Middle: IBM WebSphere Application Server 7.0.0.13
- ・DB: IBM DB2 9.7.3
- ・OS: IBM AIX 6.1 TL7 SP6
- ・VPN: 2 channels(VPN1, VPN2) via wifi at home
- *Not occur
- ・Internal network(company)
- ・Tethering(via VPN) from iPhone which is provided by company
- -Steps
- ① Convert to PDF file written in Japanese on PC
- ② Save the PDF file as an attached file to the electronic approval that is connected by vpn
- ③ Download the file saved in electronic approval on your PC
- -Problems
- When opening the file attached to the electronic approval via VPN(wifi), the following events occur.
- ・Color unevenness of image data (ex. the background becomes greenish)
- ・Characters are faint
- ・Font cannot be read and characters are not displayed.
- ・Error displayed when opening a file
- ・occurs only at PDF files and other files like Excel, word are displayed correctly.
- ・different results between VPN1 and VPN2 and VPN1 occur less events.
- Currently we are investgating the proxy and VPN differeces between VPN1 and VPN2 because there are different results from both VPNs
- We found large sized files may occur events more frequently than small sized files.
- There is regularity in the place where the replacement by zero occurs.
- Although it is different from the replacement part, it has the common point that the size of the replaced data is
- always 5 bytes. There are cases where replacement occurs with less than 5 bytes
- but it occurs when the data before replacement was originally zero.
- What could be the cause?
- Any help would be appreciated.
- -The image is binary data comparison.
- left is original and right is uploaded file. blue parts are turned to red parts(00 byte)