[Clp] CLP exception poped up when solving an LP

[usa usa]

Hi, I am using CLP to solve an LP with

   rowNum =  1002 and columNum = 6202  and totalElementNum = 6,214,404

In   *CoinCopyN* (register const T* from, const int size, register T* to)
called from CoinMemcpyN(ind,numels,index_), which is called from
gutsOfOpEqual(colordered, minor, major, numels, elem, ind, start, len);

I got an exception:

*       Unhandled exception at 0x00217A52 in MyApp.exe: 0xC0000005: Access
violation reading location 0x1BBEFFFC.*

The exception poped up at

    *case 2:         *--downto = *--downfrom;*

template <class T> inline void
*CoinCopyN* (register const T* from, const int size, register T* to)
{
    if (size == 0 || from == to)
    return;

#ifndef NDEBUG
    if (size < 0)
    throw CoinError("trying to copy negative number of entries",
            "CoinCopyN", "");
#endif

    register int n = (size + 7) / 8;  *// size = 6214404*
    if (to > from) {
    register const T* downfrom = from + size;
    register T* downto = to + size;
    // Use Duff's device to copy
    switch (size % 8) {
    case 0: do{     *--downto = *--downfrom;
    case 7:         *--downto = *--downfrom;
    case 6:         *--downto = *--downfrom;
    case 5:         *--downto = *--downfrom;
    case 4:         *--downto = *--downfrom;
    case 3:         *--downto = *--downfrom;
*    case 2:         *--downto = *--downfrom;  // exception poped up here,*
    case 1:         *--downto = *--downfrom;
    }while(--n>0);
    }

I do not understand why this happed ?

I have used CLP to solve some large benchmark Lp models without problems.

Any help would be appreciated.

thanks!
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