GDB error in eclipse: Invalid thread id: 1 - multithreading

Question

I try to debug an out-file with gdb in eclipse Version: 2021-12 (4.22.0).
With using gdb in a command shell I could start the gdb and set breakpoints without any errors. In the output I could see that several threads are created:
[New Thread 8200.0x2188]
[New Thread 8200.0x4274]
[New Thread 8200.0x276c]
[New Thread 8200.0x2a4c
But if I try to start the debugger in eclipse I always got the error message msg="Invalid thread id: 1". I also see in the output that the gdbinit file could not be loaded:
955,742 &".gdbinit: No such file or directory.\n"
955,742 12^error,msg=".gdbinit: No such file or directory."
And there is no further information, that some threads are created.
Could you please help me?
Thanks
I added the complete log:
720,985 2-gdb-version
720,989 ~"GNU gdb (GDB) 8.1\n"
720,989 ~"Copyright (C) 2018 Free Software Foundation, Inc.\n"
720,989 ~"License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html\nThis is fre\
e software: you are free to change and redistribute it.\nThere is NO WARRANTY, to the extent permitt\
ed by law. Type "show copying"\nand "show warranty" for details.\n"
720,990 ~"This GDB was configured as "x86_64-w64-mingw32".\nType "show configuration" for config\
uration details."
720,990 ~"\nFor bug reporting instructions, please see:\n"
720,990 ~"http://www.gnu.org/software/gdb/bugs/.\n"
720,990 ~"Find the GDB manual and other documentation resources online at:\n<http://www.gnu.org/soft\
ware/gdb/documentation/>.\n"
720,990 ~"For help, type "help".\n"
720,990 ~"Type "apropos word" to search for commands related to "word".\n"
720,990 2^done
720,990 (gdb)
720,991 3-environment-cd "C:/Projects/xy/03_SourceCode"
721,004 3^done
721,005 (gdb)
721,005 4-gdb-set breakpoint pending on
721,019 4^done
721,019 (gdb)
721,020 5-enable-pretty-printing
721,035 5^done
721,035 (gdb)
721,036 6-gdb-set python print-stack none
721,055 6^done
721,056 (gdb)
721,056 7-gdb-set print object on
721,066 7^done
721,066 (gdb)
721,066 8-gdb-set print sevenbit-strings on
721,082 8^done
721,082 (gdb)
721,082 9-gdb-set charset ISO-8859-1
721,098 9^done
721,098 (gdb)
721,098 10-gdb-set dprintf-style gdb
721,113 10^done
721,113 (gdb)
721,113 11source .gdbinit
721,129 &"source .gdbinit\n"
721,129 &".gdbinit: No such file or directory.\n"
721,130 11^error,msg=".gdbinit: No such file or directory."
721,130 (gdb)
721,130 12-gdb-set target-async off
721,144 12^done
721,144 (gdb)
721,144 13-gdb-set auto-solib-add on
721,160 13^done
721,160 (gdb)
721,162 14-file-exec-file C:\Temp\test_Generic.out
721,176 14^done
721,176 (gdb)
721,176 15-gdb-show --thread-group i1 language
721,191 15^done,value="auto"
721,191 (gdb)
721,192 16-gdb-set --thread-group i1 language c
721,207 16^done
721,207 (gdb)
721,207 17-interpreter-exec --thread-group i1 console "p/x (char)-1"
721,223 ~"$1 = 0xff\n"
721,223 17^done
721,224 (gdb)
721,224 18-data-evaluate-expression --thread-group i1 "sizeof (void*)"
721,239 18^done,value="8"
721,239 (gdb)
721,240 19-gdb-set --thread-group i1 language auto
721,254 19^done
721,254 (gdb)
721,255 20-interpreter-exec --thread-group i1 console "show endian"
721,271 ~"The target endianness is set automatically (currently little endian)\n"
721,271 20^done
721,271 (gdb)
721,272 21-break-list
721,273 22-stack-info-depth --thread 1
721,273 23-list-thread-groups
721,285 21^done,BreakpointTable={nr_rows="0",nr_cols="6",hdr=[{width="7",alignment="-1",col_name="nu\
mber",colhdr="Num"},{width="14",alignment="-1",col_name="type",colhdr="Type"},{width="4",alignment="\
-1",col_name="disp",colhdr="Disp"},{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},{width\
="10",alignment="-1",col_name="addr",colhdr="Address"},{width="40",alignment="2",col_name="what",col\
hdr="What"}],body=[]}
721,285 (gdb)
721,285 22^error,msg="Invalid thread id: 1"
721,285 (gdb)
721,286 23^done,groups=[{id="i1",type="process",executable="C:\Temp\test_Generic.out"}]
721,286 (gdb)
721,286 24-stack-list-frames --thread 1
721,300 24^error,msg="Invalid thread id: 1"
721,300 (gdb)