diff --git a/src/h2d.c b/src/h2d.c
index 002957f..0ec0986 100644
--- a/src/h2d.c
+++ b/src/h2d.c
@@ -54,7 +54,7 @@ remaph2d (SNP ** snpmarkers, int numsnps, Indiv ** indivmarkers,
   int *tind, tt, t, i, j, k, j1, j2;
   Indiv *indx;
   SNP *cupt;
-  char s1[50], s2[50];
+  char s1[IDSIZE+10], s2[IDSIZE+10];
 
   ZALLOC (g2, numind2, int);
   ZALLOC (g1, numindivs, int);
diff --git a/src/mapfile.c b/src/mapfile.c
index 8b17a57..6cd785b 100644
--- a/src/mapfile.c
+++ b/src/mapfile.c
@@ -74,7 +74,7 @@ genFile* constructMap(char* filename, long numrows, long rowSize, long hdrSize)
         geno -> hdrSize = hdrSize ;
 	geno->snps = (char*) mmfaddr;
 
-        printf("mmfaddr: %x  fileLength: %ld\n", geno -> snps, fileLength) ;;
+        printf("mmfaddr: %p  fileLength: %ld\n", geno -> snps, fileLength) ;;
         fflush(stdout) ;
 
 	return geno;
diff --git a/src/qpAdm.c b/src/qpAdm.c
index ad3184b..ad68848 100644
--- a/src/qpAdm.c
+++ b/src/qpAdm.c
@@ -2064,8 +2064,8 @@ void loadymv(double *ymean, double *yvar,  char *fstatsname, char **popllist, ch
 
 int mkfstats(char *parname)  
 {
- char sss[256] ; 
- char fsx[256] ; 
+ char sss[512] ; 
+ char fsx[256+10] ; 
  char ppp[256] ;  
  char pops[256] ;  
  char tpar[256] ; 
diff --git a/src/qpGraph.c b/src/qpGraph.c
index c8ea1fe..a07fe1c 100644
--- a/src/qpGraph.c
+++ b/src/qpGraph.c
@@ -431,11 +431,6 @@ main (int argc, char **argv)
    printf ("graph: %s\n", graphname);
    
 
-/**
-   sprintf(sss, "cat %s", graphname) ;
-   system(sss) ;  
-   fflush(stdout) ;
-*/
     printnl ();
     printnl ();
 
@@ -1351,7 +1346,7 @@ printfit (double *ww)
   double y, worstz, y1, y2, x1, x2, diff, sig, z;
   double *ffaa ; 
   FILE *outff;
-  char ss[MAXSTR], ssworst[MAXSTR], *ssx ;
+  char ss[MAXSTR*2], ssworst[MAXSTR*2], *ssx ;
   int isworst ;
   char **ancnames ;
 
@@ -2932,7 +2927,7 @@ int usage (char *prog, int exval)
 
 void mkfstats(char *parname)  
 {
- char sss[128] ; 
+ char sss[512] ; 
  char fsx[128] ; 
  char ppp[128] ;  
  char pops[128] ;  
diff --git a/src/qpWave.c b/src/qpWave.c
index 38548dc..406f775 100644
--- a/src/qpWave.c
+++ b/src/qpWave.c
@@ -823,7 +823,7 @@ void loadymv(double *ymean, double *yvar,  char *fstatsname, char **popllist, ch
 
 int mkfstats(char *parname)  
 {
- char sss[256] ; 
+ char sss[512] ; 
  char fsx[256] ; 
  char ppp[256] ;  
  char pops[256] ;  
diff --git a/src/qpmix.c b/src/qpmix.c
index 2872f10..4ada873 100644
--- a/src/qpmix.c
+++ b/src/qpmix.c
@@ -1307,7 +1307,7 @@ void printcv(double *coeffs, double *var, int n)
 int mkfstats(char *parname)  
 // modified from qpAdm
 {
- char sss[256] ; 
+ char sss[512] ; 
  char fsx[256] ; 
  char ppp[256] ;  
  char pops[256] ;  
diff --git a/src/snpunion.c b/src/snpunion.c
index bea4a45..9587a00 100644
--- a/src/snpunion.c
+++ b/src/snpunion.c
@@ -14,7 +14,7 @@
 #include "mcio.h"  
 #include "mcmcpars.h"  
 
-#define WVERSION   "2500" 
+#define WVERSION   "2501" 
 #define MAXFL  50   
 #define MAXSTR  512
 
@@ -64,7 +64,7 @@ int lopos = -999999999 ;
 int hipos = 999999999 ;
 int minchrom = 1 ; 
 int maxchrom = 97 ;
-long rlen, packlen ; 
+extern long rlen, packlen ; 
 
 /** 
  docheck  YES  allele flipping check