When using the mod Useful Summoned Creatures by ElderScroller, "Script error: EXPRESSION in ESR_si_lbonew" popped up when an npc summoned a bonewalker, immediately followed by a "Left eval" message. The first time this happened, I didn't get an error message, just a ctd. I can just disable this mod to get rid of this, but... It's a useful mod. Anywhos, just wondering what was up and if I can somehow fix it.

maybe, there is a local variable called but not declared.

I can't fint the mod anywhere. I could have a look at it.

Well. It seems as if he's disappeared. I downloaded it from pes, but I just checked and... It's just gone. Him, his mod, everything. I could put it up on mediafire if you really wanted to check it out.

it's ok for me.

EDIT: Took down the link.

Morrowind scripting for dummies 9.0 says that a left eval is most likely from a script not having a space before or after parenthesis's in a script. like

If ("player"->GetItemCount "Something" > 0)
should be
If ( "player"->GetItemCount "Something" > 0 )

So this should just be a basic mess up of the author and not a conflict of mods, right? Hm... Now I just hafta find this script.

ESR_si_lbonew should be the script. it's now just figuring out the mod that it's in

from what I see, there are 3 local variables, called in that script, and all of them have been declared. However, there is a DD_GlobalInitiative.state that refers to a variable called "state" in the script "DD_GlobalInitiative". This script, is included in the other esp file (that should require MWSE) included in the download, and this other esp should be loaded before the other one. How is your load order?

Does it happen only to the bonewalker? or also for other creatures? This script is referred in the script of all the summoned creatures, so you should get the same error for all.

Firstly let me say, I made sure the load order was correct, with CI_Global.esp first and Useful Summoned Creatures.esp second, and I have MWSE running.

Now that that's out of the way, AHA! With a bit of testing I discovered the issue. The reason why I had never noticed this problem before was because, and this is just a guess, no other npc that summoned a creature (even a bonewalker) had a script on them. The specific npc that caused this error was the target of a quest, specifically the mages guild one where you have to get the guild dues from some chick in a cave.

This was the test: First I attacked multiple npcs who summoned a creature without a problem. Then I made the npc that gave me an error attack me on another save, and no message popped up. Then, I started the quest that involved her and THEN attacked her. Voila, error message. So I assume when I started the quest some sort of script started on her which interfered with the mod.

Now that that's out of the way, how do I fix it? But anyways, I'm content even if there isn't a fix, just that I know what the problem is and that it isn't a big deal.

From MWSD 9



so it could be prior i was pointing out the later.

I removed Useful Summoned Creatures from Planet Elder Scrolls and would appreciate it if people didn't redistribute it.

The original poster's problem is an example of the reason why I deleted it. I originally wrote the mod with the simplest approach in mind and attached a script to each of the summonable creatures to help govern their behavior. However, this has the obvious downside of sometimes conflicting with other mods. Additionally, it can also sometimes crash the game. I'm not exactly sure why, but I believe it has to do with attaching a script that may conflict with the behavior hardcoded into the respective sEffectSummonCreatureX spell effects.

Since I no longer believe the mod is completely stable and friendly to the larger Morrowind mod ecosystem, removing it was the only responsible thing to do.

I am currently working on another mod that includes similar functionality but is based on a completely different fundamental design. While not as simple, it seems to be what I should have been doing in the first place. Ah well...live and learn I guess. I'll make a WIP thread for it in the next few days.

Sorry about that, ElderScroller. Good work, nevertheless, and good luck on future projects.