I'm having trouble finding this string; is it one we provide? Or is it possible it's related to the Unicode updates for IS2011—have you checked all function prototypes for proper use of STRING and WSTRING?
I don't know anything about Unicode updates for IS 2011. I don't know which function prototypes you are referring to. I don't use any custom InstallShield script.
This issue will occur with any Asian language or any languages not using the standard ASCII character subset. The cause of this behavior is related to how the feature transfer error object is built for InstallScript MSI projects. In this case, it is actually just a structure defined in internal script code that contains error information (as opposed to pure InstallScript projects which use a normal COM interface). The string members of these structures are still declared as ANSI strings. As a result, storing any non-standard ASCII based characters in these string members will either result in the strings becoming corrupted or possibly truncated (due to incorrect size calculations).
I've submitted work order IOA-000069733 to address this issue in a future release. As a workaround, you can override the OnComponentError function in your script to display alternate error strings instead of ones obtained from the ErrorInfo object/structure (see OnComponentError for how errors are normally displayed).
