Thanks for the suggestion but I already did that without success. Here is debug dump:
Code Select
[16-Sep-2016 14:50:53.932] [DEBUG] [session:0] Message dump:
** 00410000000000580000662500000001
** 00000055010000000000003800460069
** 006C0065002E0043006F0075006E0074
** 00280053003A005C0041007200680069
** 0076002D006D00650072006900740076
** 0065002900000000
** code=0x0041 (CMD_GET_PARAMETER) flags=0x0000 id=26149 size=88 numFields=1
** [ 85] STRING "File.Count(S:\Arhiv-meritve)"
[16-Sep-2016 14:50:53.932] [DEBUG] [session:0] Received message CMD_GET_PARAMETER
[16-Sep-2016 14:50:53.932] [DEBUG] [session:0] Requesting parameter "File.Count(S:\Arhiv-meritve)"
[16-Sep-2016 14:50:53.932] [DEBUG] H_DirInfo: path="S:\Arhiv-meritve" pattern="*" recursive=false mode=1
[16-Sep-2016 14:50:53.932] [DEBUG] [session:0] GetParameterValue(): result is 500 (INTERNAL_ERROR)
[16-Sep-2016 14:50:53.932] [DEBUG] [session:0] Sending message CMD_REQUEST_COMPLETED (size 32)
[16-Sep-2016 14:50:53.932] [DEBUG] [session:0] Outgoing message dump:
** 001D0000000000200000662500000001
** 0000001C00000000000001F400000000
** code=0x001D (CMD_REQUEST_COMPLETED) flags=0x0000 id=26149 size=32 numFields=1
** [ 28] INT32 500
[16-Sep-2016 14:50:53.932] [DEBUG] [session:0] Message dump:
** 00410000000000580000662600000001
** 00000055010000000000003800460069
** 006C0065002E0043006F0075006E0074
** 00280053003A005C0041007200680069
** 0076002D006D00650072006900740076
** 0065002900000000
** code=0x0041 (CMD_GET_PARAMETER) flags=0x0000 id=26150 size=88 numFields=1
** [ 85] STRING "File.Count(S:\Arhiv-meritve)"