Sorry for picture.
Log :
C:\Users\adm\Downloads\lorawan-stack-migrate_0.6.0_windows_386>ttn-lw-migrate devices --dry-run --verbose --source ttnv2 "iotidea032" > devices.json
DEBUG [core]parsed scheme: ""
DEBUG [core]scheme "" not registered, fallback to default scheme
DEBUG [core]ccResolverWrapper: sending update to cc: {[{discovery.thethings.network:1900 <nil> 0 <nil>}] <nil> <nil>}
DEBUG [core]ClientConn switching balancer to "pick_first"
DEBUG [core]Channel switches to new LB policy "pick_first"
DEBUG [core]Subchannel Connectivity change to CONNECTING
DEBUG [core]Subchannel picks a new address "discovery.thethings.network:1900" to connect
DEBUG [core]pickfirstBalancer: UpdateSubConnState: 0x1309e1e0, {CONNECTING <nil>}
DEBUG [core]Channel Connectivity change to CONNECTING
WARN [core]grpc: addrConn.createTransport failed to connect to {discovery.thethings.network:1900 discovery.thethings.network:1900 <nil> 0 <nil>}. Err: connection error: desc = "transport: Error while dialing dial tcp 52.178.215.58:1900: i/o timeout". Reconnecting...
DEBUG [core]Subchannel Connectivity change to TRANSIENT_FAILURE
DEBUG [core]pickfirstBalancer: UpdateSubConnState: 0x1309e1e0, {TRANSIENT_FAILURE connection error: desc = "transport: Error while dialing dial tcp 52.178.215.58:1900: i/o timeout"}
DEBUG [core]Channel Connectivity change to TRANSIENT_FAILURE
DEBUG [core]Subchannel Connectivity change to CONNECTING
DEBUG [core]Subchannel picks a new address "discovery.thethings.network:1900" to connect
DEBUG [core]pickfirstBalancer: UpdateSubConnState: 0x1309e1e0, {CONNECTING <nil>}
DEBUG [core]Channel Connectivity change to CONNECTING
WARN [core]grpc: addrConn.createTransport failed to connect to {discovery.thethings.network:1900 discovery.thethings.network:1900 <nil> 0 <nil>}. Err: connection error: desc = "transport: Error while dialing dial tcp 52.178.215.58:1900: i/o timeout". Reconnecting...
DEBUG [core]Subchannel Connectivity change to TRANSIENT_FAILURE
DEBUG [core]pickfirstBalancer: UpdateSubConnState: 0x1309e1e0, {TRANSIENT_FAILURE connection error: desc = "transport: Error while dialing dial tcp 52.178.215.58:1900: i/o timeout"}
DEBUG [core]Channel Connectivity change to TRANSIENT_FAILURE
DEBUG [core]Subchannel Connectivity change to CONNECTING
DEBUG [core]Subchannel picks a new address "discovery.thethings.network:1900" to connect
DEBUG [core]pickfirstBalancer: UpdateSubConnState: 0x1309e1e0, {CONNECTING <nil>}
DEBUG [core]Channel Connectivity change to CONNECTING
WARN [core]grpc: addrConn.createTransport failed to connect to {discovery.thethings.network:1900 discovery.thethings.network:1900 <nil> 0 <nil>}. Err: connection error: desc = "transport: Error while dialing dial tcp 52.178.215.58:1900: i/o timeout". Reconnecting...
DEBUG [core]Subchannel Connectivity change to TRANSIENT_FAILURE
DEBUG [core]pickfirstBalancer: UpdateSubConnState: 0x1309e1e0, {TRANSIENT_FAILURE connection error: desc = "transport: Error while dialing dial tcp 52.178.215.58:1900: i/o timeout"}
DEBUG [core]Channel Connectivity change to TRANSIENT_FAILURE
DEBUG [core]Subchannel Connectivity change to CONNECTING
DEBUG [core]Subchannel picks a new address "discovery.thethings.network:1900" to connect
DEBUG [core]pickfirstBalancer: UpdateSubConnState: 0x1309e1e0, {CONNECTING <nil>}
DEBUG [core]Channel Connectivity change to CONNECTING
WARN [core]grpc: addrConn.createTransport failed to connect to {discovery.thethings.network:1900 discovery.thethings.network:1900 <nil> 0 <nil>}. Err: connection error: desc = "transport: Error while dialing dial tcp 52.178.215.58:1900: i/o timeout". Reconnecting...
DEBUG [core]Subchannel Connectivity change to TRANSIENT_FAILURE
DEBUG [core]pickfirstBalancer: UpdateSubConnState: 0x1309e1e0, {TRANSIENT_FAILURE connection error: desc = "transport: Error while dialing dial tcp 52.178.215.58:1900: i/o timeout"}
DEBUG [core]Channel Connectivity change to TRANSIENT_FAILURE
DEBUG [core]Subchannel Connectivity change to CONNECTING
DEBUG [core]Subchannel picks a new address "discovery.thethings.network:1900" to connect
DEBUG [core]pickfirstBalancer: UpdateSubConnState: 0x1309e1e0, {CONNECTING <nil>}
DEBUG [core]Channel Connectivity change to CONNECTING
WARN [core]grpc: addrConn.createTransport failed to connect to {discovery.thethings.network:1900 discovery.thethings.network:1900 <nil> 0 <nil>}. Err: connection error: desc = "transport: Error while dialing dial tcp 52.178.215.58:1900: i/o timeout". Reconnecting...
DEBUG [core]Subchannel Connectivity change to TRANSIENT_FAILURE
DEBUG [core]pickfirstBalancer: UpdateSubConnState: 0x1309e1e0, {TRANSIENT_FAILURE connection error: desc = "transport: Error while dialing dial tcp 52.178.215.58:1900: i/o timeout"}
DEBUG [core]Channel Connectivity change to TRANSIENT_FAILURE
DEBUG [core]Subchannel Connectivity change to CONNECTING
DEBUG [core]Subchannel picks a new address "discovery.thethings.network:1900" to connect
DEBUG [core]pickfirstBalancer: UpdateSubConnState: 0x1309e1e0, {CONNECTING <nil>}
DEBUG [core]Channel Connectivity change to CONNECTING
WARN [core]grpc: addrConn.createTransport failed to connect to {discovery.thethings.network:1900 discovery.thethings.network:1900 <nil> 0 <nil>}. Err: connection error: desc = "transport: Error while dialing dial tcp 52.178.215.58:1900: i/o timeout". Reconnecting...
DEBUG [core]Subchannel Connectivity change to TRANSIENT_FAILURE
DEBUG [core]pickfirstBalancer: UpdateSubConnState: 0x1309e1e0, {TRANSIENT_FAILURE connection error: desc = "transport: Error while dialing dial tcp 52.178.215.58:1900: i/o timeout"}
DEBUG [core]Channel Connectivity change to TRANSIENT_FAILURE
DEBUG [core]Subchannel Connectivity change to CONNECTING
DEBUG [core]Subchannel picks a new address "discovery.thethings.network:1900" to connect
DEBUG [core]pickfirstBalancer: UpdateSubConnState: 0x1309e1e0, {CONNECTING <nil>}
DEBUG [core]Channel Connectivity change to CONNECTING