diff -ur pvm3/src/pvmcruft.c pvm3-lhh/src/pvmcruft.c
--- pvm3/src/pvmcruft.c	2001-09-27 17:25:10.000000000 -0400
+++ pvm3-lhh/src/pvmcruft.c	2004-03-31 11:03:08.361416845 -0500
@@ -293,7 +293,7 @@
  ***************/
 
 #ifndef RSHCOMMAND
-#define RSHCOMMAND  "/usr/ucb/rsh"
+#define RSHCOMMAND  "/usr/bin/rsh"
 #endif
 
 char *getenv();
@@ -840,6 +840,7 @@
 char *
 pvmgetroot()
 {
+	struct stat st_buf;
 	static char *rd = 0;
 
 	if (!rd) {
@@ -874,6 +875,12 @@
 #endif
 
 		if (!rd) {
+			rd = strdup("/usr/share/pvm3");
+			if (stat(rd, &st_buf) == 0)
+				return rd;
+			free(rd);
+			rd = NULL;
+
 			pvmlogerror("PVM_ROOT environment variable not set.\n");
 			pvmbailout(0);
 			exit(1);		/* the other meaning of bail out */