Index: openacs-4/packages/acs-bootstrap-installer/installer/index.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-bootstrap-installer/installer/index.tcl,v
diff -u -N -r1.32.2.4 -r1.32.2.5
--- openacs-4/packages/acs-bootstrap-installer/installer/index.tcl	17 May 2019 14:11:14 -0000	1.32.2.4
+++ openacs-4/packages/acs-bootstrap-installer/installer/index.tcl	11 Jun 2019 18:55:08 -0000	1.32.2.5
@@ -143,7 +143,7 @@
 }
 
 # AOLserver must support ns_cache.
-if {[llength [info commands ns_cache]] < 1} {
+if {[info commands ns_cache] eq ""} {
     append errors "<li><p><strong>The <code>ns_cache</code> module is not installed.  This is required for OpenACS."
     set error_p 1
 }