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Former Member
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I’m having a problem with JCo client connection. JCo crashes (bringing down the JVM as well) and this error message is dumped.


# A fatal error has been detected by the Java Runtime Environment:


#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x6e6f3dd9, pid=5860, tid=6104


# JRE version: Java(TM) SE Runtime Environment (7.0_51-b13) (build 1.7.0_51-b13)

# Java VM: Java HotSpot(TM) Client VM (24.51-b03 mixed mode windows-x86 )

# Problematic frame:

# V  [jvm.dll+0xc3dd9]


# Core dump written. Default location: ........hs_err_pid5860.mdmp


# If you would like to submit a bug report, please visit:



---------------  T H R E A D  ---------------

Current thread (0x007e2000):  JavaThread "main" [_thread_in_vm, id=6104, stack(0x02be0000,0x02ce0000)]

siginfo: ExceptionCode=0xc0000005, reading address 0x00000009


EAX=0x100d5de0, EBX=0x02cdf0e0, ECX=0x00000008, EDX=0x00000001

ESP=0x02cdeefc, EBP=0x02cdef04, ESI=0x007e2000, EDI=0x02cdf320

EIP=0x6e6f3dd9, EFLAGS=0x00010246

Top of Stack: (sp=0x02cdeefc)

0x02cdeefc:   02cdf320 007e2130 02cdef24 0659361d

0x02cdef0c:   007e2130 05408c6c 00000000 00000000

0x02cdef1c:   007e2130 00002710 02cdf3a8 0659c1c5

0x02cdef2c:   007e2130 02cdf0e0 02cdf340 02cdf320

0x02cdef3c:   007e2000 20115a50 20115a50 00000000

0x02cdef4c:   00000000 00000000 00000000 00000000

0x02cdef5c:   00000000 00000000 00000000 00000000

0x02cdef6c:   00000000 00000000 00000000 00000000

Instructions: (pc=0x6e6f3dd9)

0x6e6f3db9:   8b 0d 1c 1a 96 6e 8b 45 0c 8b 00 83 c4 08 85 c9

0x6e6f3dc9:   7e 05 8b 3c 01 eb 0c 8b 0d 14 1a 96 6e 8b 14 01

0x6e6f3dd9:   8b 7a 08 c7 86 6c 01 00 00 07 00 00 00 83 3d 98

0x6e6f3de9:   f3 96 6e 01 7e 19 80 3d 29 ed 96 6e 00 74 07 f0

Register to memory mapping:


[error occurred during error reporting (printing register info), id 0xc0000005]

Stack: [0x02be0000,0x02ce0000],  sp=0x02cdeefc,  free space=1019k

Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)

V  [jvm.dll+0xc3dd9]

C  [sapjcorfc.dll+0x361d]

C  [sapjcorfc.dll+0xc1c5]










j  com.....Database.JCO.JCOConnection2.createBapi(Ljava/lang/String;Ljava/lang/StringBuffer;)Lcom/sap/mw/jco/JCO$Function;+21

j  com.....Database.JCO.JCOCatalog2.fetchCubes(Ljava/lang/String;)V+34

v  ~StubRoutines::call_stub

V  [jvm.dll+0x13f35a]

V  [jvm.dll+0x202c6e]

V  [jvm.dll+0x13f3dd]

V  [jvm.dll+0xc9bc2]

V  [jvm.dll+0xcd813]

C  [×JCOWrp.dll+0xe9e7]

C  [×JCOWrp.dll+0x57f8]


---------------  P R O C E S S  ---------------

Java Threads: ( => current thread )

  0x05448400 JavaThread "Service Thread" daemon [_thread_blocked, id=4372, stack(0x06490000,0x06590000)]

  0x0543ec00 JavaThread "C1 CompilerThread0" daemon [_thread_blocked, id=4568, stack(0x061c0000,0x062c0000)]

  0x0543d800 JavaThread "Attach Listener" daemon [_thread_blocked, id=3408, stack(0x06050000,0x06150000)]

  0x05412800 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=4204, stack(0x05ea0000,0x05fa0000)]

  0x0540e400 JavaThread "Finalizer" daemon [_thread_blocked, id=4176, stack(0x05bb0000,0x05cb0000)]

  0x05409400 JavaThread "Reference Handler" daemon [_thread_blocked, id=4016, stack(0x05960000,0x05a60000)]

=>0x007e2000 JavaThread "main" [_thread_in_vm, id=6104, stack(0x02be0000,0x02ce0000)]

Other Threads:

  0x05408000 VMThread [stack: 0x05670000,0x05770000] [id=5892]

  0x0545a800 WatcherThread [stack: 0x06390000,0x06490000] [id=5236]

VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None


def new generation   total 4928K, used 2957K [0x0fe00000, 0x10350000, 0x15350000)

  eden space 4416K,  66% used [0x0fe00000, 0x100e3580, 0x10250000)

  from space 512K,   0% used [0x10250000, 0x10250000, 0x102d0000)

  to   space 512K,   0% used [0x102d0000, 0x102d0000, 0x10350000)

tenured generation   total 10944K, used 0K [0x15350000, 0x15e00000, 0x1fe00000)

   the space 10944K,   0% used [0x15350000, 0x15350000, 0x15350200, 0x15e00000)

compacting perm gen  total 12288K, used 3219K [0x1fe00000, 0x20a00000, 0x23e00000)

   the space 12288K,  26% used [0x1fe00000, 0x20124de0, 0x20124e00, 0x20a00000)

No shared spaces configured.

Dynamic libraries:

0x775f0000 - 0x77770000 C:\Windows\SysWOW64\ntdll.dll

0x74e60000 - 0x74f70000 C:\Windows\syswow64\kernel32.dll

0x74e10000 - 0x74e57000 C:\Windows\syswow64\KERNELBASE.dll

0x76ac0000 - 0x76af5000 C:\Windows\syswow64\WS2_32.dll

0x75bd0000 - 0x75c7c000 C:\Windows\syswow64\msvcrt.dll

0x75ee0000 - 0x75fd0000 C:\Windows\syswow64\RPCRT4.dll

0x74cd0000 - 0x74d30000 C:\Windows\syswow64\SspiCli.dll

0x74cc0000 - 0x74ccc000 C:\Windows\syswow64\CRYPTBASE.dll

0x76c80000 - 0x76c99000 C:\Windows\SysWOW64\sechost.dll

0x76920000 - 0x76926000 C:\Windows\syswow64\NSI.dll

0x75bc0000 - 0x75bc5000 C:\Windows\syswow64\PSAPI.DLL

0x74d70000 - 0x74e10000 C:\Windows\syswow64\ADVAPI32.dll

0x6e2f0000 - 0x6e3a7000 C:\Windows\system32\MSVCP100D.dll

0x6cfb0000 - 0x6d123000 C:\Windows\system32\MSVCR100D.dll

0x76260000 - 0x762ef000 C:\Windows\syswow64\OLEAUT32.dll

0x75d80000 - 0x75edc000 C:\Windows\syswow64\ole32.dll

0x76020000 - 0x760b0000 C:\Windows\syswow64\GDI32.dll

0x75c80000 - 0x75d80000 C:\Windows\syswow64\USER32.dll

0x76ab0000 - 0x76aba000 C:\Windows\syswow64\LPK.dll

0x76930000 - 0x769cd000 C:\Windows\syswow64\USP10.dll

0x6a0f0000 - 0x6a12c000 C:\Windows\system32\pdh.dll

0x76b00000 - 0x76b60000 C:\Windows\system32\IMM32.DLL

0x76160000 - 0x7622c000 C:\Windows\syswow64\MSCTF.dll

0x6a030000 - 0x6a0ed000 Z:\BIN\M8SvrDA.dll

0x74ad0000 - 0x74b8f000 C:\Windows\system32\MSVCR100.dll

0x716e0000 - 0x716e8000 C:\Windows\system32\Secur32.dll

0x6e630000 - 0x6e9b0000 E:\Views\...\JRE\170_51\32-bit\bin\client\jvm.dll

0x70180000 - 0x70187000 C:\Windows\system32\WSOCK32.dll

0x716a0000 - 0x716d2000 C:\Windows\system32\WINMM.dll

0x6dcd0000 - 0x6dcdc000 E:\Views\...\JRE\170_51\32-bit\bin\verify.dll

0x6d210000 - 0x6d230000 E:\Views\...\JRE\170_51\32-bit\bin\java.dll

0x02d00000 - 0x02d13000 E:\Views\...\JRE\170_51\32-bit\bin\zip.dll

0x06590000 - 0x0691d000 Z:\BIN\sapjcorfc.dll

0x06920000 - 0x06e9a000 Z:\BIN\LIBRFC32.dll

0x68050000 - 0x68059000 C:\Windows\system32\VERSION.dll

0x7c360000 - 0x7c3b6000 C:\Windows\system32\MSVCR71.dll

0x769d0000 - 0x76a27000 C:\Windows\syswow64\SHLWAPI.dll

0x7c3c0000 - 0x7c43c000 C:\Windows\system32\MSVCP71.dll

0x74f70000 - 0x75bba000 C:\Windows\syswow64\SHELL32.dll

0x05cb0000 - 0x05d9c000 Z:\BIN\dbghelp.dll

0x74a90000 - 0x74aa1000 C:\Windows\system32\NETAPI32.dll

0x74a80000 - 0x74a89000 C:\Windows\system32\netutils.dll

0x74a60000 - 0x74a79000 C:\Windows\system32\srvcli.dll

0x74a50000 - 0x74a5f000 C:\Windows\system32\wkscli.dll

0x74a10000 - 0x74a1f000 C:\Windows\system32\SAMCLI.DLL

0x6d590000 - 0x6d5a4000 E:\Views\...\JRE\170_51\32-bit\bin\net.dll

0x71790000 - 0x717cc000 C:\Windows\system32\mswsock.dll

0x71780000 - 0x71786000 C:\Windows\System32\wship6.dll

0x6d630000 - 0x6d63f000 E:\Views\...\JRE\170_51\32-bit\bin\nio.dll

0x70230000 - 0x70240000 C:\Windows\system32\NLAapi.dll

0x70220000 - 0x70230000 C:\Windows\system32\napinsp.dll

0x701d0000 - 0x70214000 C:\Windows\system32\DNSAPI.dll

0x701c0000 - 0x701c8000 C:\Windows\System32\winrnr.dll

0x6ea10000 - 0x6ea2c000 C:\Windows\system32\IPHLPAPI.DLL

0x6ea00000 - 0x6ea07000 C:\Windows\system32\WINNSI.DLL

0x6e9c0000 - 0x6e9f8000 C:\Windows\System32\fwpuclnt.dll

0x70150000 - 0x70156000 C:\Windows\system32\rasadhlp.dll

0x6cb70000 - 0x6ccb3000 E:\Views\...\JRE\170_51\32-bit\bin\awt.dll

0x70c90000 - 0x70c95000 C:\Windows\System32\wshtcpip.dll

0x70240000 - 0x7032b000 C:\Windows\system32\DBGHELP.DLL

VM Arguments:

jvm_args: -Djco.trace_level=0 -Djco.trace_path=e:\\jco_log

java_command: <unknown>

Launcher Type: generic


Environment Variables:


CLASSPATH=C:\Program Files (x86)\Common Files\Compuware\DLM40JNI.jar


---------------  S Y S T E M  ---------------

OS: Windows NT 6.1 , 64 bit Build 7601 Service Pack 1

CPU:total 2 (2 cores per cpu, 1 threads per core) family 6 model 37 stepping 1, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3, sse4.1, sse4.2, popcnt, aes, tsc, tscinvbit

Memory: 4k page, physical 3145272k(128040k free), swap 6288688k(2927480k free)

vm_info: Java HotSpot(TM) Client VM (24.51-b03) for windows-x86 JRE (1.7.0_51-b13), built on Dec 18 2013 19:09:58 by "java_re" with unknown MS VC++:1600

time: Tue Aug 26 02:03:01 2014

elapsed time: 34 seconds

the jco trace log doesn't provide any details in native call of sapjcorfc.dll, Here is the trace log:


|                              SAP Java Connector (JCo)                              |

|                Copyright (c) 2000-2005 SAP AG. All rights reserved.                |

|                                Version Information                                 |


Java Runtime:

Operating System:    Windows Server 2008 R2 6.1 for x86

Java VM:             1.7.0_51 Oracle Corporation

Java Codepage:       Cp1252


JCo API:                 2.1.5 (2005-02-15)

JCo middleware:      2.1.5 (2005-02-15)

JCo library:             2.1.5 (2005-02-15)

RFC library:            640.0.59


JCo classes:        ...\path\sapjco.jar

JCo library:          ...\path\sapjcorfc.dll

RFC library:         System-defined path


|                                      Manifest                                      |


Manifest-Version: 1.0

Implementation-Version: 20050220 2119 [2.1.5 (2005-02-15)]

Specification-Title: SAP Java Connector

Specification-Version: 2.1.5



Created-By: Ant 1.4.1


Implementation-Vendor: SAP AG, Walldorf

Specification-Vendor: SAP AG, Walldorf


main [23:52:34:230]: ********************  Sun Aug 31 23:52:34 EDT 2014   ***************************

could someone help look at this issue? Any advice is appreciated!

Accepted Solutions (0)

Answers (1)

Answers (1)

Product and Topic Expert
Product and Topic Expert
0 Kudos


I recommend at least to use the latest available JCo patch level which was JCo 2.1.10.

Besides, JCo 2.1 was never officially supported by SAP for any JVM higher than version 1.4 - and you are using version 1.7. Meanwhile JCo 2.1 is completely out of SAP support.

I suggest to start with migrating your application and use JCo 3.0 instead.

Best regards,