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Merged
WolframPfeifer merged 1 commit into from
Nov 13, 2025
Merged

Improve error message in headless mode #3685

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7 changes: 5 additions & 2 deletions key.ui/src/main/java/de/uka/ilkd/key/gui/MainWindow.java
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Original file line number Diff line number Diff line change
Expand Up @@ -394,8 +394,11 @@ public static MainWindow getInstance() {
public static MainWindow getInstance(boolean ensureIsVisible) {
if (GraphicsEnvironment.isHeadless()) {
LOGGER.error(
"Error: KeY started in graphical mode, " + "but no graphical environment present.");
LOGGER.error("Please use the --auto option to start KeY in batch mode.");
"Error: KeY started in graphical mode, but no graphical environment present or supported.");
LOGGER.error(
"If this is unexpected, ensure that you are not using a headless version of Java " +
"(or force windowed mode with java parameter -Djava.awt.headless=false).");
LOGGER.error("Otherwise, please use the --auto option to start KeY in batch mode.");
LOGGER.error("Use the --help option for more command line options.");
System.exit(-1);
}
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