Symptom
In a SystaxFromSQL sentence, it returns “Error 10999
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Name cannot begin with the '=' character, hexadecimal value 0x3D. Line 1, position 879.” in the Test Mode (AEM > Application > Client Features > 'ApplicationName' > Run Mode > Test Mode).
Cause
The “culture value” in the Web.config file in C:\inetpub\wwwroot\appeon\AEM\ is not correct.
Solution
In the Web.config file in C:\inetpub\wwwroot\appeon\AEM\Web.config, change the culture value in the below line：
<globalization requestEncoding="utf-8" responseEncoding="utf-8" uiCulture="auto" culture="en-US"/>
to the one that is the same with your system language, for example, if your system language is Argentinean Spanish, you can change the above culture value to “es-AR”, to resolve the issue.