I get "Sorry, the content could not be loaded." when I mouse over devices in the Web GUI that were added with a powershell script.

Please post the script. The usual cause of this is that the script is not providing a value for some properties that the website is expecting to be non-NULL.

A future release of NPM improves this situation - SWIS will automatically fill in default values for properties when you are adding nodes through the API instead of requiring the scripts to provide them.

function AddPoller($PollerType)

{

    $poller["PollerType"]=$PollerType;

    $pollerUri = New-SwisObject $swis -EntityType "Orion.Pollers" -Properties $poller

}

# add a node

$newNodeProps = @{

  EntityType="Orion.Nodes";

  IPAddress=$ip;

  IPAddressGUID=[System.Guid]$ipGuid;

  Caption="Node";

  DynamicIP=$False;

  EngineID=1;

  Status=1;

  UnManaged=$False;

  Allow64BitCounters=$True;

  SysObjectID="";

  MachineType="";

  VendorIcon="";

  # SNMP v2 specific

  ObjectSubType="SNMP";

  SNMPVersion=2;

  Community="public";

  # polling timing (optional)

  RediscoveryInterval=5; # minutes (5..525600=1 year)

  PollInterval=120; # seconds (1..1200)

  StatCollection=10; # minutes (1..600)

  BufferNoMemThisHour=-2;

  BufferNoMemToday=-2;

  BufferSmMissThisHour=-2;

  BufferSmMissToday=-2;

  BufferMdMissThisHour=-2;

  BufferMdMissToday=-2;

  BufferBgMissThisHour=-2;

  BufferBgMissToday=-2;

  BufferLgMissThisHour=-2;

  BufferLgMissToday=-2;

  BufferHgMissThisHour=-2;

  BufferHgMissToday=-2;

  External=$False;

}

$newNodeUri = New-SwisObject $swis –EntityType "Orion.Nodes" –Properties $newNodeProps

$nodeProps = Get-SwisObject $swis -Uri $newNodeUri

# register specific pollers for the node

$poller = @{

  NetObject="N:"+$nodeProps["NodeID"];

  NetObjectType="N";

  NetObjectID=$nodeProps["NodeID"];

}

# Details

AddPoller("N.Details.SNMP.Generic");

# Uptime

AddPoller("N.Uptime.SNMP.Generic");

# CPU

AddPoller("N.Cpu.SNMP.CiscoGen3");

# Memory

AddPoller("N.Memory.SNMP.CiscoGen3");

You must set "PercentMemoryUsed", "CPULoad", "MemoryUsed" values to "-2" or "-1"  . I had problem like this.

NCM Node Details