in teamcity-symbol-agent/src/main/java/jetbrains/buildServer/symbols/SymbolsIndexer.java [348:353]
private static void checkAndReportRuntimeRequirements(@NotNull BuildAgentConfiguration agentConfiguration, @NotNull BuildProgressLogger logger){
for (String parameterName : agentConfiguration.getConfigurationParameters().keySet()) {
if(NET_4X_PATTERN.matcher(parameterName).find()) return;
}
logger.logBuildProblem(BuildProblemData.createBuildProblem(NET_45_NOT_FOUND_PROBLEM_IDENTITY, BuildProblemTypes.TC_ERROR_MESSAGE_TYPE, ".NET 4.5 runtime required for symbols indexing was not found on build agent."));
}