Good morning from Greg Bennett who is running sbcl 2.0.10 under linux mint 19.2 64-bit and using asdf 3.3.6 with mcclim from mcclim-20201016-git via quicklisp. I am working on a large project and wish to capture the results of a trial compile in a file so that I can check notes, warnings, errors, etc.. Such a compile essentially loops over a set of asdf load-systems. Not unnaturally for me, I make mistakes, and sometimes I get blocked by an unexpected error which I believe I have managed to isolate. I am quite unsure about the locus of the unexpected error .. asdf ? sbcl ? mcclim ? their interaction ? so I am starting with asdf-devel. I am uncertain how much to include by way of source files, so i have opted to summarise things here first. New sbcl 2.0.10 in emacs listener Load a set-up-file to ensure I am using asdf 3.3.6 [I gather this is significant for sbcl]. And some of my own logging tools. Two files attached. Load mcclim Running (in-package :cl-user) (a-l "mcclim" "doit" (doit) "Z" :base-name "/home/gwbennett/mcclim-code/") which has the effect of writing the results to a file, in this case /home/gwbennett/LOGS/MCCLIM/MCCLIM2020-lsbcl-to-Z-26-NOV-at-14:5:2.lsp" The process exits with: ; wrote /home/gwbennett/.cache/common-lisp/sbcl-2.0.10-linux-x64/home/gwbennett/mcclim-code/check-qmb/one/test-qmb-tmpJU0JWO19.fasl ; compilation finished in 0:00:00.051 ; No value Now suppose I do something which contains an error, such as CL-USER> (asdf-version) Since (asdf-version) is not in the cl-user package, this is an error. What I get back is a different error message: #<SB-SYS:FD-STREAM for "file /home/gwbennett/LOGS/MCCLIM/MCCLIM2020-lsbcl-to-Z-26-NOV-at-14:5:2.lsp" {1008BEC8A3}> is closed [Condition of type SB-INT:CLOSED-STREAM-ERROR] Which is my unexpected error. Sometimes after ABORT (twice), this error can block me from defining any new function or loading a new function .. all I receive is a repeat of this message. Thank you for your patience Cheers Greg Bennett