I have been trying to create a static function that allows me to create an Akka Actor so I can try to play with it from within slime, but I am running into a very odd issue. ----- Issue: The static function for Java works perfectly, but the equivalent static function for slime does not. ----- The files for reproducing this issue are attached, and the repository that I am using is: https://github.com/ubikation/chemicalambda Testing requires having the correct jars, which are installable via the pom.xml: mvn install mvn dependency:copy-dependencies The second command should create a target/dependency folder that you have to add to the classpath, along with the dir containing all of the files I've attached to this email. ----- Here is my calling session: CL-USER> (load "/home/ubikation/src/lisp/chemicalambda/AkkaTest.lisp") T CL-USER> (my-test) This is the error when trying to call the static function: Java exception 'java.lang.NoClassDefFoundError: akka/actor/ActorSystem'. [Condition of type JAVA-EXCEPTION] Restarts: 0: [RETRY] Retry SLIME REPL evaluation request. 1: [*ABORT] Return to SLIME's top level. 2: [ABORT] Abort thread. Backtrace: 0: (#<FUNCTION {1E9ABE91}> #<JAVA-EXCEPTION {15883401}> #<FUNCTION {1E9ABE91}>) 1: (APPLY #<FUNCTION {1E9ABE91}> (#<JAVA-EXCEPTION {15883401}> #<FUNCTION {1E9ABE91}>)) 2: (SYSTEM::RUN-HOOK SYSTEM::*INVOKE-DEBUGGER-HOOK* #<JAVA-EXCEPTION {15883401}> #<FUNCTION {1E9ABE91}>) 3: (INVOKE-DEBUGGER #<JAVA-EXCEPTION {15883401}>) 4: org.armedbear.lisp.Lisp.error(Lisp.java:382) 5: org.armedbear.lisp.Java.jstatic(Java.java:487) 6: org.armedbear.lisp.Java$pf_jstatic.execute(Java.java:513) 7: org.armedbear.lisp.Primitive.execute(Primitive.java:123) 8: (JSTATIC "test" "AkkaApiSimple") 9: (VOID-FUNCTION) 10: (MY-TEST) 11: (SYSTEM::%EVAL (MY-TEST)) 12: (EVAL (MY-TEST)) 13: (SWANK::EVAL-REGION "(my-test) ") 14: (#<FUNCTION {210E38B2}>) 15: (SWANK::TRACK-PACKAGE #<FUNCTION {210E38B2}>) 16: (#<FUNCTION {2CAC3F12}>) 17: (SWANK::CALL-WITH-RETRY-RESTART "Retry SLIME REPL evaluation request." #<FUNCTION {2CAC3F12}>) 18: (#<FUNCTION {6060CDA7}>) 19: (FUNCALL #<FUNCTION {6060CDA7}>) 20: (#<FUNCTION (LAMBDA (SWANK-BACKEND::FN)) {735DC05F}> #<FUNCTION {6060CDA7}>) 21: (APPLY #<FUNCTION (LAMBDA (SWANK-BACKEND::FN)) {735DC05F}> #<FUNCTION {6060CDA7}> NIL) 22: (SWANK-BACKEND:CALL-WITH-SYNTAX-HOOKS #<FUNCTION {6060CDA7}>) 23: (SWANK::CALL-WITH-BUFFER-SYNTAX NIL #<FUNCTION {6060CDA7}>) 24: (SWANK::REPL-EVAL "(my-test) ") 25: (SWANK:LISTENER-EVAL "(my-test) ") 26: (SYSTEM::%EVAL (SWANK:LISTENER-EVAL "(my-test) ")) 27: (EVAL (SWANK:LISTENER-EVAL "(my-test) ")) 28: (#<FUNCTION {1000D825}>) 29: (JRUN-EXCEPTION-PROTECTED #<FUNCTION {1000D825}>) 30: (SWANK:EVAL-FOR-EMACS (SWANK:LISTENER-EVAL "(my-test) ") "COMMON-LISP-USER" 12) 31: (APPLY #<EVAL-FOR-EMACS {4FAC1D53}> ((SWANK:LISTENER-EVAL "(my-test) ") "COMMON-LISP-USER" 12)) 32: (SWANK::PROCESS-REQUESTS NIL) 33: (#<FUNCTION {276E6D58}>) 34: (EVAL (SWANK:LISTENER-EVAL "(test) ")) 35: (#<FUNCTION {42CCC0A1}>) 36: (JRUN-EXCEPTION-PROTECTED #<FUNCTION {42CCC0A1}>) 37: (SWANK:EVAL-FOR-EMACS (SWANK:LISTENER-EVAL "(test) ") "COMMON-LISP-USER" 9) 38: (APPLY #<EVAL-FOR-EMACS {4FAC1D53}> ((SWANK:LISTENER-EVAL "(test) ") "COMMON-LISP-USER" 9)) 39: (SWANK::PROCESS-REQUESTS NIL) 40: (#<FUNCTION {107AAC4A}>) 41: (#<FUNCTION {65C536B9}>) 42: (FUNCALL #<FUNCTION {65C536B9}>) 43: ((FLET SWANK-BACKEND:CALL-WITH-DEBUGGER-HOOK) #<SWANK-DEBUGGER-HOOK {773F0D3A}> #<FUNCTION {65C536B9}>) 44: (APPLY #<(FLET CALL-WITH-DEBUGGER-HOOK) {768BDFE1}> #<SWANK-DEBUGGER-HOOK {773F0D3A}> #<FUNCTION {65C536B9}> NIL) 45: (SWANK-BACKEND:CALL-WITH-DEBUGGER-HOOK #<SWANK-DEBUGGER-HOOK {773F0D3A}> #<FUNCTION {65C536B9}>) 46: (#<FUNCTION {59176994}>) 47: (SWANK::CALL-WITH-BINDINGS ((*STANDARD-OUTPUT* . #S(SLIME-OUTPUT-STREAM)) (*STANDARD-INPUT* . #S(SLIME-INPUT-STREAM)) (*TRACE-OUTPUT* . #S(SLIME-OUTPUT-STREAM)) (*ERROR-OUTPUT* . #S(SLIME-OUTPUT-STREA.. 48: (#<FUNCTION {3A65F5B1}>) 49: (JRUN-EXCEPTION-PROTECTED #<FUNCTION {3A65F5B1}>) 50: (#<FUNCTION {7BE5556A}>) 51: (JRUN-EXCEPTION-PROTECTED #<FUNCTION {7BE5556A}>) 52: (SWANK::HANDLE-REQUESTS #S(SWANK::MULTITHREADED-CONNECTION :SOCKET #<java.net.ServerSocket ServerSocket[addr=0.0.0.0/0.0.0..... {6BC6FEA9}> :SOCKET-IO #<TWO-WAY-STREAM {55794086}> :DEDICATED-OUTPUT NI.. 53: (SWANK::REPL-LOOP #S(SWANK::MULTITHREADED-CONNECTION :SOCKET #<java.net.ServerSocket ServerSocket[addr=0.0.0.0/0.0.0..... {6BC6FEA9}> :SOCKET-IO #<TWO-WAY-STREAM {55794086}> :DEDICATED-OUTPUT NIL :USE.. 54: (#<FUNCTION {B7B4941}>) 55: (SWANK::CALL-WITH-BINDINGS NIL #<FUNCTION {B7B4941}>) 56: (#<FUNCTION {4B06504A}>) 57: (FUNCALL #<FUNCTION {4B06504A}>) 58: (#<FUNCTION (LAMBDA ()) {B8150C1}>) 59: (THREADS::THREAD-FUNCTION-WRAPPER #<FUNCTION (LAMBDA ()) {B8150C1}>) I've tried to be very clear but I'm sure I've missed something. I don't know what's causing this error, and I can't tell if I'm going about this in some stupid manner or if this is a symptom of a more complex issue. If you need any help reproducing this issue please email me, I'm desperate for any input. Thank you very much for your time!