Too Large Events

For some evio files, the events are too large. The errors are:

The lines below might hint at the cause of the crash.
If they do not help you then please submit a bug report at
http://root.cern.ch/bugs. Please post the ENTIRE stack trace
from above as an attachment in addition to anything else
that might help us fixing this issue.
===========================================================
#5  std::_Rb_tree<unsigned int, std::pair<unsigned int const, bankIndex_t>, std::_Select1st<std::pair<unsigned int const, bankIndex_t> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, bankIndex_t> > >::_M_erase (this=this
entry=0x7f6162e57e40, __x=0xc038b9e9502d69cf) at /usr/include/c++/4.8/bits/stl_tree.h:1125
#6  0x00000000004426e5 in clear (this=0x7f6162e57e40) at /usr/include/c++/4.8/bits/stl_tree.h:860
#7  clear (this=0x7f6162e57e40) at /usr/include/c++/4.8/bits/stl_map.h:789
#8  EvioBankIndex::initBankIndex (this=0x7f6162e57e40, buffer=0x7f6161f15a40) at src/reader/EvioBankIndex.cc:24
#9  0x000000000043cdc3 in EvioDataEvent::init (this=this
entry=0x7f6161f15a40, ptr=<optimized out>, len=<optimized out>) at src/reader/EvioDataEvent.cc:136
#10 0x000000000043c5aa in EvioFileReader::readEvent (this=this
entry=0x7f6161d8f010, eventnum=eventnum
entry=496) at src/reader/EvioFileReader.cc:114
#11 0x0000000000409787 in main (argc=<optimized out>, argv=<optimized out>) at src/convertor/evio2root.cc:851
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Running an eviodump on the file we find

*********************** EVENT # 497  ***********************

        +------------------------------------------------+------------+------------+
        |                                            bank|       nrows|       ncols|
        +------------------------------------------------+------------+------------+
        |                                        DC::dgtz|        5568|          11|
        |                                        DC::true|        5568|          24|
        |                                   GenPart::true|           2|           7|
        +------------------------------------------------+------------+------------+