diff --git a/doc/ImpactTv2.pdf b/doc/ImpactTv2.pdf
index 72b2ae5..fbe6413 100755
Binary files a/doc/ImpactTv2.pdf and b/doc/ImpactTv2.pdf differ
diff --git a/src/Appl/Distribution.f90 b/src/Appl/Distribution.f90
index 3de33b9..c5486f6 100644
--- a/src/Appl/Distribution.f90
+++ b/src/Appl/Distribution.f90
@@ -858,6 +858,10 @@ subroutine read_Dist(this,nparam,distparam,ib)
         sum2 = 0.0
  
           read(12,*)nptot
+          if(nptot.ne.this%Npt) then
+            print*,"Error: Total particle # in the partcl.data file is different from that in the ImpactT.in file."
+            stop
+          endif
           avgpts = nptot/nproc
           nleft = nptot - avgpts*nproc
           if(myid.lt.nleft) then