400 Bad Request though working before

Dear Community,

I created a C# application to receive data from TR Eikon via Eikon Data API. Here are the code lines:

IEikon eikon = Eikon.CreateDataAPI();
eikon.SetAppKey("3ed10c489c1d49c2b3cfbb45a2541e813b1112b1");
eikon.GetLoggerFactory().AddConsole(LogLevel.Debug);
var x = eikon.GetDataRaw("USOILN=ECI", "ECI_ACT_DT");

In the first two hours, this worked perfectly. I could use the C# application. I could receive data directly from Eikon into my database. After a log out from Eikon I received the following error message:

{"ErrorCode":400,"Message":"BadRequest: Backend error. 400 Bad Request","Data"}

I searched for this Error Message and found out that in April Olivier DAVANT wrote "This ‘400 Bad Request’ error is a known issue that impacts several customers. Thomson Reuters development teams are working on a solution."

Could the development team already solve this problem?

This question is time critical.

Thanks for your help.

Christopher

Please find below the full error message

dbug: EikonDataAPI.DataGrid[0]
UDF Request: {"Entity":{"E":"DataGrid","W":{"instruments":["USOILN=ECI"],"
fields":[{"name":"ECI_ACT_DT"}]}},"ID":"123" }
info: EikonDataAPI.Profile[0]
Find port in a file: C:\Users\Administrator\AppData\Roaming\Thomson Reuter
s\Eikon API Proxy\.portInUse
info: EikonDataAPI.Profile[0]
use port: 9000
info: EikonDataAPI.Profile[0]
Return port: 9000
dbug: EikonDataAPI.DataGrid[0]
UDF Response: {"ErrorCode":400,"ErrorMessage":"Backend error. 400 Bad Requ
est"}
fail: EikonDataAPI.DataGrid[0]
{"ErrorCode":400,"Message":"BadRequest: Backend error. 400 Bad Request","D
ata":{},"InnerException":null,"TargetSite":null,"StackTrace":null,"HelpLink":nul
l,"Source":"JSONRequest","HResult":-2146233088}