Writing data from HTML5 based web app

[mrahman252003]

Hello Everybody,
Can anybody share experience related to database reading and writing from TwinCAT HMI (HTML5 based Web app)? I have a case like this, I want to read, write, and update the database from the TwinCAT extension module (HTML5 based Web app). I have created a windows DLL and tested with simple windows app (the wiki data set ) and that works as my expectation. Now I want to link the DLL to the extension DLL (loaded by the HTML5 based Web app) and do the same with it. If I try it from HMI I get an exception just before updating the database. But the same dataset works fine with the windows app. Any point or tips? I tried to build the fluent DLL myself but there are so many errors while I compile the project by the VS2017 community version. The first picture shows what I want to achieve and the second picture shows that it throws an exception when we update the database. Any help would be appreciated.

[mrahman252003]

The problem has been resolved.