Update: It looks like I forgot to add dependency dll to the work directory. Now the dll is loaded but none of the callbacks can be found. I get this in the log:
I. 2013-12-18 14:13:24.100. SQL Anywhere MobiLink Replay Tool Version 12.0.1.3726
I. 2013-12-18 14:13:24.100.
I. 2013-12-18 14:13:24.100. Copyright © 2001-2012, iAnywhere Solutions, Inc.
I. 2013-12-18 14:13:24.100. Portions copyright © 1988-2012, Sybase, Inc. All rights reserved.
I. 2013-12-18 14:13:24.100. Use of this software is governed by the Sybase License Agreement.
I. 2013-12-18 14:13:24.100. Refer to http://www.sybase.com/softwarelicenses.
I. 2013-12-18 14:13:24.100.
I. 2013-12-18 14:13:24.198. <Main> Option 1: -n 10
I. 2013-12-18 14:13:24.198. <Main> Option 2: -o mlreplay.log
I. 2013-12-18 14:13:24.198. <Main> Option 3: ml-replay.dll
I. 2013-12-18 14:13:24.198. <Main> Option 4: C:\ml_replay_82\recorded_protocol_fw820syncserver_2.mlr
I. 2013-12-18 14:13:24.198. <Main> Starting MLReplay with recorded protocol file, C:\ml_replay_82\recorded_protocol_fw820syncserver_2.mlr
I. 2013-12-18 14:13:24.200. <Main> The recorded protocol version is 65
W. 2013-12-18 14:13:24.702. <Main> [5003] MLReplay was unable to load the GetUploadTransaction callback
E. 2013-12-18 14:13:24.702. <Main> [-5039] MLReplay was unable to load the IdentifySimulatedClient callback, which is a required callback
E. 2013-12-18 14:13:24.709. <Main> [-5048] MLReplay was unable to load the FiniIdentifySimulatedClient callback, which is a required callback
W. 2013-12-18 14:13:24.709. <Main> [5004] MLReplay was unable to load the DelayCreationOfSimulatedClient callback
W. 2013-12-18 14:13:24.709. <Main> [5013] MLReplay was unable to load the DelayDestructionOfSimulatedClient callback
W. 2013-12-18 14:13:24.716. <Main> [5005] MLReplay was unable to load the GetDownloadApplyTime callback
W. 2013-12-18 14:13:24.716. <Main> [5002] MLReplay was unable to load the ReportEndOfReplay callback
W. 2013-12-18 14:13:24.716. <Main> [5012] MLReplay was unable to load the DelayStartOfReplay callback
W. 2013-12-18 14:13:24.716. <Main> [5006] MLReplay was unable to load the GlobalInit callback
W. 2013-12-18 14:13:24.716. <Main> [5007] MLReplay was unable to load the GlobalFini callback
E. 2013-12-18 14:13:24.716. <Main> [-5002] MLReplay failed to initialize correctly
I. 2013-12-18 14:13:24.737. <Main> Ending MLReplay