Unhandled exception at 0x05EF7A00 in Acrobat.exe: 0xC0000005: Access violation executing location 0x05EF7A00. After adding moretha 10 addcheckmarks

Hi,

Iam gettting  "Unhandled exception at 0x05EF7A00 in Acrobat.exe: 0xC0000005: Access violation executing location 0x05EF7A00." while closing the pdf after adding morethan 10 addcheckmarks. if there is lessathan 10 checkmarks the pdf is working without any issue.