Hello Christian, In a clean install of Debian 11, openjdk version "11.0.16" 2022-07-19, I unzipped BaseX973.zip and started the the HTTP server with: basexhttp -S (with debugging set to true). The following error-message appeared: java.lang.IllegalThreadStateException: process hasn't exited at java.base/java.lang.ProcessImpl.exitValue(ProcessImpl.java:521) at org.basex.util.Util.error(Util.java:311) at org.basex.BaseXHTTP.start(BaseXHTTP.java:301) at org.basex.BaseXHTTP.<init>(BaseXHTTP.java:125) at org.basex.BaseXHTTP.main(BaseXHTTP.java:54) which is repeated 10 times (all messages are exactly identical) If the server gets started with: 'basexhttp &' all is fine, no errors. The server starts up normally after these errors and it can be shut down cleanly again. In a few of my scripts the following errors pops up: Creating Database... java.lang.ClassNotFoundException: com.sun.org.apache.xerces.internal.util.XMLCatalogResolver at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581) at ... etc (multiple classes, long list) Creating Database... .java.lang.NumberFormatException: For input string: "E" at java.base/jdk.internal.math.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2054) at ... etc repeated twice. The errors are seemingly without consequence, all is functioning fine and the created databases seem OK. Actually the only reason I noticed the errors is because I made the foolish decision to set debugging to true ... :) I tested versions 9.7 and 9.7.3 on multiple Debian 11 boxes with openjdk 11.0.16, and version 9.7 in an older Debian 9 box with openjdk 11.0.6, results are identical. Best, Marc