Problem in packin process

Dear all,

I tried to run in.packing process but an ERROR message appeared :
"The variable 'delta' is being used without being initialized". It refers to the file neighbor.cpp, line 1257.
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int flag = 0;
if(radvary_flag == 0) {
for (int i = 0; i < nlocal; i++) {
delx = x[i][0] - xhold[i][0];
dely = x[i][1] - xhold[i][1];
delz = x[i][2] - xhold[i][2];
rsq = delx*delx + dely*dely + delz*delz;
if (rsq > deltasq) flag = 1; }}

else {
for (int i = 0; i < nlocal; i++) {
delx = x[i][0] - xhold[i][0];
dely = x[i][1] - xhold[i][1];
delz = x[i][2] - xhold[i][2];
delr = radius[i] - rhold[i];
rsq = delx*delx + dely*dely + delz*delz;
delrsq = delr*delr;

if (delrsq > deltasq || rsq > deltasq - 2.*delr*delta + delr*delr)
flag = 1; } }
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The 'delta' variable is in the penultimate line. However, it is initialized line 1199 as a double. Then, a value is given lines 1211 and 1224 : delta = 0.5 * (skin - (delta1+delta2)). In if(...) and else loops.
I tried to reinitialize delta but it didn't work.

Where should I (re)initialize 'delta'? And should I reinitialize it as equal to 0.5 * (skin - (delta1+delta2)) ?

Thank you in advance,
Igor.